DE1962223A1 - Optical device - Google Patents

Description

4690 Herne,. 8000 Munich 23,

¹⁹ ü i ρ I. -1 η g. RH B ahr ^{Eisenacher Strasse 17}

140 r » Pal.-Anw. Biizter

ΡΛ-app. Hwrai "iiB-Trtn" .pohl DIpl.-PHyS. Edtiard ΒβΙΖίβΓ Telephone: 39Θ011

Telephone: 50930 ..... -. -. »8012

515 62 Dipf.-lng. W. Herrmann-Trentepohl 39so «

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Bahr patents Herne Babetzpat Munich

Telex 08229853 Telex 0524562

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Bayrische Vereinsbank Munich 952

Ip. - »_ _ _ oaynauia veremsDanK Muncnen!

y Q / /. Z 3 Dresdner Bank AQ Herne 202436

Postal checking account Dortmund 558 68

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Munich

VISION ENGINEERING LIMITED
Send, Woking, Surrey / Great Britain

Optical device

The invention relates to improvements in optical
Devices with strong zoom out and it's target
of the invention, the usual eyepiece or the eyepieces
to eliminate in such devices, so that an observer is not forced to an accurate and often uncomfortable viewing position.

009828/1 US

The invention creates an optical device for microscopes and screen projectors without eyepieces, which creates an enlarged exit light hole, which is characterized by a number of lenticular Areas in the light path between a viewed object and the eye of a beholder that have the Traverse the light path at a speed that is above the eye's inertia, whereby the surfaces are shaped in such a way that they reduce the angle of incidence of light due to the fact that they are above the eye inertia Increase the speed of traversal to the angle of incidence of the light.

In the case of a microscope, a reflection system is preferably used in the light path and the lens-shaped Surfaces are formed as curved depressions in a polished surface. In the case of a screen pro jector, a light transmission system is preferably used and the lenticular surfaces are on convex Projections formed on the light exit side of a translucent plate.

The crossing or scanning of the curved surfaces is most easily achieved in that they are formed on a circular disc that extends rotates at a suitable speed.

060128/1 US

However, it has been found that a continuous belt-like motion with reflective or translucent lenticular surfaces arranged in a stepped or helical pattern is preferred when high quality resolution is required. This is a result of the limitation on the number of surfaces that can be provided near the center of the disc. Ä

Binocular depth viewing can be done with a microscope

gap by the provision of a light beam / arrangement in the Light path between a viewed object and the curved reflective surfaces can be achieved and the lens properties can be chosen so that a pair of exit light holes with a diameter of about 50 ram and a distance of about the average human eye relief.

In Figures 1 to 8 of the drawings, the subject matter of the invention is shown, for example, and explained in more detail below. It shows f

Fig. 1 is a schematic side view of an eyepiece-less Microscope j

Fig. 2 is a plan view of the microscope of Fig. 1}

3 shows a schematic enlarged section of a Lenticular surface formed as a recess in a turntable, which is a part a microscope forms;

009828/1 US

K shows a schematic enlarged section of part of a light-permeable pane which has convex lenticular projections}

Fig. 5 is a schematic side view of a continuous belt having reflective surfaces}

Fig. 6 is a schematic front view of a binocular stereoscopic microscope having a continuous Tape reflector used;

7 shows a schematic front view of a non-stereoscopic microscope which has a disk reflector used}

8 is a schematic side view of a microscope which uses a disk reflector and which forms an exit light hole large enough to provide an image for both eyes.

Figures 1 and 2 show the basic structure of a typical ocular microscope} this requires Forming a circular light hole for each eye with a diameter of nearly 5 cm from a light hole, which is usually close to 3 mm in diameter.

Ed.ii Image from a focal plane at B is pre-enlarged by a first objective C and further enlarged by the Okulax ^ projection lens D, which in turn

009828/1146

the image passes through the light slit prism E to a To generate image in the focal point on the rotating disk G. There are therefore two pictures of the Generated light beam gap prism and these are superimposed on the disk G on each other.

Assuming that G is a plane mirror, it would have two exit light holes in the viewing plane Form A at normal eye relief. The lens F, which is located close to the disk, produces in Connection with the lens H the light hole in the viewing plane, the lens H also fulfills the function, to increase the apparent size of the disk G and therefore to enlarge the angle of the field to the eye.

In practice, the disk G is formed from a finely polished plate with a large number of lenticular depressions is provided and their rotational speed is above that Sluggishness.

Fig. 3 shows a typical light beam A in position 1, which strikes the edge A of the recess and that at an angle cX. is reflected. When this indentation passes over or scans the light beam, the angle (K bie decreases to zero and rises to the angle oC on the opposite slope «. Scanning the indentation therefore reflects the light beam over an angle of 2 cX.

009828/1146

Therefore, when the disk G rotates in the large number of wells, two light holes are generated in plane A at a distance of 2 ^ - , which makes it unnecessary to own ekulare and which makes viewing much easier for the user.

The angle <X can be changed arbitrarily and is a Puncture the radius of curvature of the pits and the depth of the pits.

The lens F is dimensioned so that the diverging rays that form the light hole are collimated so that they hit the pane G at right angles, as can be seen in the top view, and when this light is further transmitted through the lens F after the Reflection by the disk G, these rays converge to form the light hole in the plane A after passing through the lens H «

The portion of a rotating lens shown in Pig * 4 illustrates how the principle of the invention can be applied to a translucent pane, which is inserted into the light path, e.g. in a profile screen projector

Rays of light bundles are shown passing through dl Step through the pane from left to right and you can see the angle of light incidence «! when leaving the linear convex projection «multiplied will.

003828/1148

Practical forms of microscopes in which the optical system according to the invention is implemented are shown in FIG Figures 6, 7 and 8 of the drawings.

In the microscope shown in Fig. 6, the viewed object is at 20 and its image is projected through the objective lenses 21 and the ocular projection lenses 22 to angularly arranged mirrors 23 which form part of a light beam gap arrangement 2k.

The light beams are then from the mirrors through first field lenses 26 into the focal point in the plane of the band 27 transferred.

The belt 27, which is driven by the motor 28 at a speed above the eye inertia over rollers 29 and in Contact is driven with a flutter preventing plate is shown in Fig. 5 in side view. It is made of a vacuum-aluminized plastic material made and with a series of lines of lenticular recesses not shown in stepwise or provided spiral arrangement.

The bundles of light emitted by the rapidly rotating Depressions are reflected with an exit angle that is larger than their entrance angle, run through an end field lens 31 and continue to be transformed by the mirror 32 into wide exit light holes (through dashed circles 33) reflected in the front plate of the microscope body.

009828/1146

These exit light holes with a diameter of almost 50 mm are arranged at normal eye relief and the viewer is shown a greatly enlarged stereoscopic image of the object at 20 without the Use of eyepieces is required.

A non-stereoscopic microscope is shown in Figure 7, with like reference numerals for parts which are the same as those of FIG. 6 are used.

The image of an object at 20 is obtained through a single objective lens 21 and an ocular projection lens 22 projected to the light beam gap arrangement 25.

The light beams are reflected from the light beam gap arrangement (compare E in FIGS. 1 and 2) through a first field lens 26 and are then reflected by lens-shaped depressions in the disk Jk, which is set in rotation by a motor 28.

The enlarged light bundles are then through a Egg field lens 31 is projected and from a mirror 32 2u wide .tin; »gangs-1 i chtholes reflected through f; Screed ei te circles 33 are shown.

This Ililirosl "cpsrt does not produce as clear-limited image ti" per the · "aar Fi g, b" because it does not eat possible sufficient. iii · i ^ = Ysri levies nutrients to the center of Sclioibe

This creates a series of black rings in the final image · This difficulty could largely be due to this eliminates the fact that you only use the outer part of a larger disc, but the band shape is the reflector of the pig. 6 is preferable because the lines of the lenticular pits are inclined so that they create a homogeneous image, or in other words, the small circular images on the surface of each lens touch each other while moving and create a complete image «

The microscope shown in Fig. 8 is very simple executed. The beam gap arrangement of the previously described embodiments is omitted, however are the lenticular recesses of the disc 34 so sized to make a much larger exit light hole nearly 12.7 cm in diameter. this has of course the use of a much larger one Result in object lighting and restricts its use to cases in which only one lighting suntar set is required, e.g. for research microscopes

From the description of the invention, the technique schematiech k shown in Fig. Follows that the optical device geinäes conveniently for light transmission applications using can be used.

009828/1146

The material of the disc or the tape that defines the light path Crossed between the projector and the screen should be clear and lenticular Surfaces be provided or embossed.

0 0 9828/1148

Claims (6)

Patent claim • 1 · / Optical device for microscopes and screen projectors without eyepieces that have an enlarged exit light hole generated, characterized by a series of lenticular surfaces in the light path between a viewed object and the eye of a beholder that traverses the light path at a speed traverse, which is above the eye inertia, wherein the surfaces are shaped such that they the Angle of incidence of light as a result of the above eye inertia lying crossing speed to the light emission angle increase. 2. Apparatus according to claim 1, characterized in that the lens-shaped surfaces on a rotating disc (26) are formed. 3. Device according to claim 1, characterized in that the lens-shaped surfaces are mechanically driven flexible, endless belt (27) are formed. 4. Apparatus according to claim 2 or * 31 characterized in that that the surfaces are reflective. h Γ] 9? γ c / ι ι 4 β ORIGINAL INSPECTED 5. Device according to claim 2 or 3, characterized in that the lens-shaped surfaces are transparent 6. Device according to one of claims 1 to 4, characterized by a jet gap arrangement (25) in the light path to form a pair of exit light holes (33) at normal interpupillary distance. 7 · Device according to claim 6, characterized by two objective lenses (21) to form a stereoscope! see picture at normal eye relief. 009828/1 U6 Blank page