WO1996000405A2 - Anamorphic lens for a photographic flash assembly - Google Patents
Anamorphic lens for a photographic flash assembly Download PDFInfo
- Publication number
- WO1996000405A2 WO1996000405A2 PCT/US1995/007882 US9507882W WO9600405A2 WO 1996000405 A2 WO1996000405 A2 WO 1996000405A2 US 9507882 W US9507882 W US 9507882W WO 9600405 A2 WO9600405 A2 WO 9600405A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- camera
- longitudinal axes
- curvature
- illumination assembly
- Prior art date
Links
- 238000005286 illumination Methods 0.000 claims abstract description 74
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 description 14
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/08—Anamorphotic objectives
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/06—Simple or compound lenses with non-spherical faces with cylindrical or toric faces
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B19/00—Cameras
- G03B19/02—Still-picture cameras
- G03B19/04—Roll-film cameras
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0503—Built-in units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2219/00—Cameras
- G03B2219/02—Still-picture cameras
- G03B2219/04—Roll-film cameras
- G03B2219/045—Roll-film cameras adapted for unloading the film in the processing laboratory, e.g. disposable, reusable or recyclable cameras
Definitions
- This invention relates generally to anamorphic lenses, and more particularly to an anamorphic lens having a cylindrical and/or an acylindrical surface, and to an improved photographic camera flash assembly incorporating an anamorphic lens having a cylindrical and/or an acylindrical surface for providing independent illumination control at a target.
- Illumination assemblies for flash systems of currently popular photographic cameras comprise a trough-type reflector which surrounds a long, slender Xenon flash tube, and a transparent front cover to isolate the flash tube and reflector from physical contact.
- Front covers typically have optical power to improve the distribution of flash illumination in the object scene being photographed, and thus the front cover can be regarded as a lens.
- U.S. Patent No. 5,160,192 describes an illuminating instrument for decreasing light distribution nonuniformity at an object scene, composed of a multi-ellipsoid reflector, a light source, and a condenser which concentrates light from the flash burst in an object scene.
- the condenser has an effective convex cylindrical Fresnel lens rear surface in which the Fresnel grooves are perpendicular to the longitudinal axis of the flash tube and a concentric, convex Fresnel front lens surface.
- U.S. Patent No. 4,462,063 describes a photo flash assembly which includes an aspheric lens to enhance light output and scene illumination.
- the aspheric lens has a convexly curving outward surface of either spherical or aspherical shape and a spherical rear, inner surface.
- the spherical lens surfaces described by English and Sugawara have the potential to condense object scene illumination in an infinite number of radial directions due to their radial symmetry, while the use of a cylindrical surface, as described by Sugawara, can improve the illumination profile in one direction, for instance, the horizontal or the vertical direction, but the corresponding orthogonal direction is unaffected.
- photographic flash light sources are typically elongate
- the use of spherical and cylindrical optical power, separately or in combination, to improve scene illumination is a compromise attempt to control the illumination distribution in independent, typically orthogonal, directions.
- the inventor has recognized a need for an anamorphic lens which is suitable for use in a photo flash assembly, for example, to provide independent illumination control in an object scene in two directions.
- the invention describes an acylindrical, anamorphic lens which has application in a photo flash assembly, for instance, to provide independent illumination control in an object scene in two directions.
- An object of the invention is to provide an anamorphic lens having particular application to a photographic camera flash assembly including a reflector and illumination means, in which the lens comprises a first refracting surface having either a cylindrical or an acylindrical shape, and having a longitudinal axis; and a second refracting surface having either a cylindrical or an acylindrical shape, and a longitudinal axis, in which the longitudinal axes of both surfaces are crossed with respect to each other, for providing independent illumination control in at least two directions at a target or in a scene.
- Another object of the invention is to provide an anamorphic lens having particular application to non-image forming illumination systems, such as photograph camera flash assemblies, and those used in copier, microfilm and other duplicating machine systems, for example, for providing independent illumination control in at least two directions transverse to the optical axis at a target.
- a further object of the invention is to provide an acylindrical, anamorphic lens having particular application to fast non-image forming illumination systems, such as photograph camera flash assemblies in which the cover lens has an f/# less than or equal to about f/5, for providing more efficient illumination distribution control in an object scene.
- the radius of curvature of the cylinder increases with distance from the center zone to the edge zone of the lens, resulting in a refracting surface over the clear aperture of the lens which provides the desired illumination pattern in an object scene.
- Another object of the invention is to provide a single use electronic flash camera that may incorporate previously used elements in a recycled camera, including a camera body having a film cassette chamber. The ability to recycle parts promotes the efficient use of scarce natural resources, saves space in landfills, and reduces the cost of camera.
- the camera body supports single use camera parts, including a flash device having a reflector at one end, an opening at another end, and an anamorphic lens mounted in the opening.
- the anamorphic lens includes means for providing independent illumination control in at least two directions.
- Many single use camera parts, including the anamorphic lens, may be recycled in any particular camera.
- An unexposed roll of film then is mounted in the film cassette chamber of the camera body.
- Still another object of the invention is to provide a method of recycling a single use camera with an electronic flash by incorporating previously used single use camera parts comprising the steps of: providing a previously used camera body having a film cassette chamber; supporting in the camera body previously used single use camera parts, including a flash device having a reflector with a light source at one end, an opening at another end, and an anamorphic lens mounted in the opening, the lens including means for providing independent illumination control in at least two different directions; and loading an unexposed roll of film into the film cassette chamber of the camera body.
- FIG. 1 is a top plan view in the x-z plane of an anamorphic lens having a first surface with either a cylindrical curvature or an acylindrical curvature normal to the plane of the paper (y-z plane) and a second surface with either a cylindrical curvature or -6-
- FIG. 2 is a side elevational view of the lens of FIG. 1 (y-z plane) ;
- FIG. 2(a) is a side elevational view of the lens of FIG. 1 with respect to a system optical axis which is defined by a light source and an object plane;
- FIG. 3 is a left side elevational view of a photographic illumination assembly application of the invention showing a trough reflector, a flash lamp and an anamorphic lens having a cylindrical first surface curvature in the y-z plane and an acylindrical second surface curvature in the x-z plane;
- FIG. 4 is a top plan view of the photographic illumination assembly of FIG. 3;
- FIG. 5 is an elevational view in the x-y plane showing the range of orientations between the longitudinal axes of the first and second lens surfaces;
- FIG. 10 is an exploded perspective view of a recyclable single use camera utilizing the illumination flash assembly of FIG. 3;
- FIG. 11 is a front perspective view of the single use camera shown in FIG. 10;
- FIG. 12 is a partial front perspective view of the body of the single use camera shown in FIGS. 10 and 11;
- FIG. 13 is a partially exploded rear view of the camera shown in FIGS. 10 - 12; and FIG. 14 is a partial rear view of the single use camera of FIG. 13 showing the reloading of a film cassette.
- acylindrical includes a cross sectional surface contour which deviates slightly from the cross sectional spherical contour of a cylindrical lens, as understood by those skilled in the art.
- the spherical contour may be deformed by a conic perturbation, such as having a hyperbolic, parabolic, ellipsoidal or other surface profile. That surface contour would then be acylindrical as defined.
- the meaning of acylindrical also encompasses a variation in the shape of the lens along the axis of the cylinder regardless of whether the cross sectional contour of the lens surface deviates from spherical.
- an anamorphic lens 10 is composed of a body of optical material 12 which has a first refracting surface 14 and a second refracting surface 16.
- Second surface 16 can be either cylindrical or cylindrically aspherical; i.e., acylindrical.
- An acylindrical curvature on surface 16 becomes especially desirable when the f/# of the surface approaches values of about f/5 and smaller.
- a constant radius of curvature from the center zone to the edge zone of the lens typically results in light passing through the center zone being distributed to a different location relative to the optical axis than the light passing through the edge zone of the lens.
- the curvature at the edge zone can be decreased, or flattened, by making the surface curvature acylindrical; for example, by putting a conic figure such as that of a hyperbola on the surface.
- the first surface 14 has a longitudinal axis 22 which runs transverse to a plane of curvature of the lens surface, and which is preferably or typically orthogonal to the optical axis 18 of the lens. As shown in FIG. 2, the longitudinal axis 22 is parallel to the y-axis of the accompanying coordinate system and the curvature of first surface 14 lies in horizontal planes parallel to the x-z plane .
- the invention places no restriction on the radial orientation of longitudinal axis 22 in the x-y plane, or to the orientation of optical axis 18.
- the second surface 16 of lens 10 can also be either cylindrical or acylindrical for the same reason discussed for first surface 14; and second surface 16 likewise has a longitudinal axis 24, as shown in FIG. 1. Similar to longitudinal axis 22, axis 24 is preferably or typically orthogonal to optical axis 18. In a still preferred embodiment, the longitudinal axes 22 and 24 are mutually orthogonal; however, it is within the scope of the invention that the axes can be arbitrarily crossed in the x-y plane, thus giving the lens its anamorphic characteristic. As shown in FIG. 5, a useful range of angular orientations between the longitudinal axes of the first and second surfaces is between about 40 degrees to 140 degrees.
- the cylindrical/acylindrical combination of surfaces 14, 16, is not restricted by the invention other than to allow the independent control of illumination in at least two coplanar directions transverse to the optical axis 18 to achieve the desired energy distribution in an object scene.
- both lens surfaces 14, 16 are convex; i.e., the center of curvature of surface 14 lies to the right of the surface, and the center of curvature of surface 16 lies to the left of the surface.
- the invention does not preclude the use of a concave or other surface curvature, depending upon the target illumination distribution that is desired. Examples of distribution profiles are shown in FIGS. 6-9, described in greater detail below.
- the lux value along the ordinate represents the amount of light present at the corresponding point of the object field depicted along the abscissa, for the purpose of discussion.
- the illumination at the center of the optical field can be easily varied to produce greater illumination such as seen in FIG. 6, or to produce a more uniform distribution profile, such as in FIG. 9. Accordingly, illumination at the edges of the optical field can be comparably varied depending on the requirements of the particular optical system or application based on the variation in the conic constant.
- the anamorphic lens described herein above has general application in any illumination system in which a particular target energy distribution is desired and achievable by independently controlling the illumination distribution in at least two directions transverse to the optical axis of the system. Further, the invention is particularly applicable to non-imaging illumination systems, such as a photographic camera flash assembly, for example, as shown in FIGS. 3 and 4 for use in a camera, such as a recyclable single-use camera, an example of which is shown in FIGS. 10-14.
- non-imaging illumination systems such as a photographic camera flash assembly, for example, as shown in FIGS. 3 and 4 for use in a camera, such as a recyclable single-use camera, an example of which is shown in FIGS. 10-14.
- FIGS. 3 and 4 An improved photographic camera illumination assembly 30, is shown in FIGS. 3 and 4, and comprises a reflector 32 which is generally trough shaped and having an open end 33 over which a lens/cover 10 is located; and a flash lamp 34 located near the back wall 40 of the reflector; the general characteristics of such a reflector assembly being well known to those skilled in the art.
- the lens component 10 of the flash assembly is identical to anamorphic lens 10 described herein above and thus like parts are referred to with the same reference numerals as in FIGS. 1 and 2, such as body of optical material 12.
- lens 10 is located over the open end 33 of -11-
- First lens surface 14 is cylindrical and has a longitudinal axis 22, FIG. 2.
- Second lens surface 16 is acylindrical and has a longitudinal axis oriented orthogonally to axis 24. The curvature of acylindrical surface 16 is defined by a SAG Z where
- Y distance out from the optical axis;
- A aspheric deformation constant;
- d 12 mm., the diameter of the lens; and the distance from VR to Vi is about 9.4 mm. (where VR is the on-axis point of reflector back wall 40) and the distance from Vi to V2 is about 2.3 mm.
- the optical axis 19 of the illumination assembly 30 can be skewed in relationship with the optical axis 18 of the lens.
- the illumination assembly optical axis 19 is defined by a light source 50, such as the flash lamp 34, and an object plane.
- the optical axis of the lens 18 can be varied with respect to the longitudinal axes 22, 24 of the first and second lens surfaces, depending on the requirements of a particular optical system in which the lens 10 is introduced. Referring now to FIGS.
- the illumination assembly 30 can be contained within the assemblage of a camera, such as a recyclable single use camera 100 having three major structural components; a main body or frame 102, a front cover 120 which is attached to the front of the body, and a rear cover 130 which is attached to the rear of the body.
- a camera such as a recyclable single use camera 100 having three major structural components; a main body or frame 102, a front cover 120 which is attached to the front of the body, and a rear cover 130 which is attached to the rear of the body.
- the body 102 includes a pair of formed chambers 104, 106 for retaining a film cassette 108 and a take-up roll, such as spool 110, respectively.
- the pair of chambers 104, 106 are oppositely disposed relative to an exposure gate 107, FIG. 14.
- the body 102 additionally supports the following camera parts which are attached to the body prior to the attachment of the covers 120, 130: a taking lens 112 which is attached to the front of the body 102 by means of a retainer 114 and a support plate 116 sandwiching the lens therebetween, wherein the support plate has a contact switch 117; and a plastic viewfinder 118.
- the viewfinder 118 may be a one-piece viewfinder comprising a support and two optically aligned lenses, all of which may be molded together from a common material in a single molding process in accordance with the invention disclosed in commonly owned U.S. Patent No. 5,353,165. The disclosure of this patent is incorporated by reference herein.
- a shutter mechanism 119 consisting of a keeper plate 122 having a depressible shutter release portion for tripping a shutter blade 124, biased by a spring 123 via a high-energy lever 126, which is also biased by helical spring 127; a film advancing and metering mechanism consisting of a thumbwheel 129 which engages the spool (not shown) of the loaded film cassette 108, a sprocket 132 for engaging film perforations having a spring biased portion extending into a rotatable cam 134 which engages a metering lever 136 which is biased by means of a spring 138, the cam having an extending portion 138 for contacting a frame counter 140; a light baffle 142 which is mounted into the rear of the body 102 and into the exposure gate 107, FIG.
- the illumination assembly may include a single touch flashing charging and control circuit as disclosed in the .commonly assigned, copending utility patent application referred to above, the disclosure of which is incorporated by reference herein.
- the illumination assembly is made operable, preferably according to the particular embodiment, by a one touch cantilevered portion 201 of the front cover 120, FIG. 11.
- the front cover 120 and the rear cover 130 are sandwiched and held together along with the body 102 by means discussed subsequently, to form an assembled camera.
- a decorative label 152 may be subsequently attached to the finished camera 100 to deter a user from opening the camera and provide a convenient place for product identification and operational information.
- single use cameras such as the described camera 100, are designed to be recycled by the manufacturer after a purchaser has completed exposing the loaded film and turned the camera over to a photofinisher for development of the film. See, for instance, U.S. Patent No. 5,329,330 to Sakai, et al. Therefore, certain parts of the cameras are designed to last through a suitable number of cycles of sale, use, reconstruction, and resale. Conversely, for quality reasons, among others, certain parts should be replaced each time a camera is reconstructed.
- the door 154 may be attached to the rear cover by a living or flexible hinge integrally formed as a groove or a reduced thickness portion of the cover.
- a living hinge in a film cassette door for a single use camera is disclosed in commonly owned U.S. Patent No. 5,255,041, the disclosure of which is incorporated by reference herein.
- the door 154 may be connected to the rear cover by a frangible connection integrally formed therewith and designed to break away from the remainder of the rear cover. In either case, the opening of the door 154 provides access to film cassette 108 without damaging or exposing the camera parts attached to the camera body 102.
- a second door 156 can also be provided on the rear cover 130 to be flexibly opened or broken away by the photofinisher to remove the flash battery 150, if desired. See FIG. 13.
- the camera 100 is then turned over to the manufacturer for recycling as will now be described with reference to the FIGS. 10-14.
- the recycling process may comprise the following steps: First, the front cover 120 and rear cover 130 may be detached from the camera body 102.
- the covers 120, 130 and body 102 may utilize a number of means for attaching the structural parts together; for example, hook and/or press fitting members may be used, or the parts can be ultrasonically welded together.
- each cover may have a suitable number of conventional releasable hook structures (one of which is shown at 161, 162) or other attachment means for allowing removal of the covers from the body.
- the covers may be made from a recyclable plastic such as polystyrene and can be sent to be pulverized.
- the pulverized material may be blended with virgin materials and new covers or other parts molded therefrom.
- the prewind spool 110, the taking lens 112, and light baffle 142 (unless integrally molded with the body 102) also are removed.
- the taking lens 112 also may be similarly pulverized with other lenses, blended with virgin materials, and new lenses made therefrom.
- Other parts, typically more costly components designed to be reused such as the main body 102 and the major parts supported by the body, e.g., the viewfinder 118, shutter mechanism 119, film advancing and metering mechanism, and flash illumination assembly 30, including the anamorphic lens 10, etc. may be examined carefully for wear or damage. Those parts deemed damaged or worn may be removed from the body 102 and replaced with new parts. Those remaining reusable parts, such as the camera flash assembly 30, shutter mechanism 119, etc., that can be reused remain supported by the camera body, for construction into a camera 100.
- a new front cover 120 is then fitted to the front face of the body 102 and an unexposed roll of film 109 contained within a fresh cassette 108 is loaded into the film cartridge chamber 104. A leading portion of the film 109 contained with the cassette 108 is then engaged with the take up spool 110, housed within the body chamber 106, as is conventionally known. A new rear cover 130 is then snapped or otherwise attached onto the rear of the camera body 102 and/or to the front cover 120 by any of the attachment means discussed above.
- a less rigorous but not preferred recycling process may be employed in which the covers 120, 130 are not replaced with new parts.
- the cameras would be inspected visually after the back cover is removed. If the camera was deemed reusable as a whole, a new film 109 then would be reloaded into the film chamber and threaded onto the take-up spool. The rear cover then would be re-attached to the camera body and/or front cover.
- the film 109 may be then prewound onto the take-up spool 110, which is supported for rotation in chamber 106 so that the film is wound back into the cassette 108 as the film is being exposed.
- a limited torque electric screwdriver or other tool may be used to prewind the film onto the prewind spool. If a new take-up spool is not provided and if the exposed end of the prewind spool previously was deformed to prevent reuse of the spool for prewinding purposes, sufficient heat and/or pressure must be applied to rotate the spool.
- At least one wind and trip check may be done to simulate taking a picture, thereby bringing the counter down to 24 (assuming a 24 exposure roll) .
- the camera then may be inserted into a cardboard casing or a label such as 152 attached thereto by adhesive.
- the recycled camera then may be humidity sealed in a foil wrap, plastic bag or the like, and packaged in an outer cardboard box for sale.
- the recycled single use camera " 100 utilizing previously used single use camera parts, such as the flash illumination assembly 30 with anamorphic lens 10, is now fully assembled and ready for consumer use.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960700875A KR960704248A (en) | 1994-06-23 | 1995-06-21 | ANAMORPHIC LENS FOR A PHOTOGRAPHIC FLASH ASSEMBLY |
EP95924638A EP0715728A1 (en) | 1994-06-23 | 1995-06-21 | Anamorphic lens for a photographic flash assembly |
JP8503305A JPH09502545A (en) | 1994-06-23 | 1995-06-21 | Distortion Lens for Photo Flash Assembly |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26439294A | 1994-06-23 | 1994-06-23 | |
US08/264,392 | 1994-06-23 | ||
US32708994A | 1994-10-21 | 1994-10-21 | |
US08/327,089 | 1994-10-21 | ||
US08/330,637 | 1994-10-28 | ||
US08/330,637 US5615394A (en) | 1994-06-23 | 1994-10-28 | Anamorphic lens for a photographic flash assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1996000405A2 true WO1996000405A2 (en) | 1996-01-04 |
WO1996000405A3 WO1996000405A3 (en) | 1996-02-15 |
Family
ID=27401700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1995/007882 WO1996000405A2 (en) | 1994-06-23 | 1995-06-21 | Anamorphic lens for a photographic flash assembly |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0715728A1 (en) |
JP (1) | JPH09502545A (en) |
CA (1) | CA2166886A1 (en) |
WO (1) | WO1996000405A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006119385A (en) * | 2004-10-22 | 2006-05-11 | Sigma Corp | Front cover of strobe luminescence system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428399A (en) * | 1944-08-02 | 1947-10-07 | Frank G Kirby | Photographic apparatus |
DE3925916A1 (en) * | 1989-01-12 | 1990-07-26 | Pioneer Electronic Corp | LIGHT RADIATION HEATING DEVICE |
US5055976A (en) * | 1989-09-21 | 1991-10-08 | Asahi Kogaku Kogyo Kabushiki Kaisha | Strobe flashing device |
US5315332A (en) * | 1991-04-11 | 1994-05-24 | Fuji Photo Film Co., Ltd. | Lens-fitted photographic film package and flash unit |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59228221A (en) * | 1983-06-08 | 1984-12-21 | Sumitomo Electric Ind Ltd | Hybrid lens |
-
1995
- 1995-06-21 WO PCT/US1995/007882 patent/WO1996000405A2/en not_active Application Discontinuation
- 1995-06-21 JP JP8503305A patent/JPH09502545A/en active Pending
- 1995-06-21 CA CA 2166886 patent/CA2166886A1/en not_active Abandoned
- 1995-06-21 EP EP95924638A patent/EP0715728A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428399A (en) * | 1944-08-02 | 1947-10-07 | Frank G Kirby | Photographic apparatus |
DE3925916A1 (en) * | 1989-01-12 | 1990-07-26 | Pioneer Electronic Corp | LIGHT RADIATION HEATING DEVICE |
US5055976A (en) * | 1989-09-21 | 1991-10-08 | Asahi Kogaku Kogyo Kabushiki Kaisha | Strobe flashing device |
US5315332A (en) * | 1991-04-11 | 1994-05-24 | Fuji Photo Film Co., Ltd. | Lens-fitted photographic film package and flash unit |
Non-Patent Citations (1)
Title |
---|
IBM TECHNICAL DISCLOSURE BULLETIN., vol.27, no.2, July 1984, NEW YORK US page 1213 'Tag Reader Optics-Cylindrical Lens' * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006119385A (en) * | 2004-10-22 | 2006-05-11 | Sigma Corp | Front cover of strobe luminescence system |
Also Published As
Publication number | Publication date |
---|---|
WO1996000405A3 (en) | 1996-02-15 |
CA2166886A1 (en) | 1996-01-04 |
JPH09502545A (en) | 1997-03-11 |
EP0715728A1 (en) | 1996-06-12 |
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