CN102662203A

CN102662203A - Diaphragm

Info

Publication number: CN102662203A
Application number: CN2012101483560A
Authority: CN
Inventors: 邱基斯; 樊仲维; 唐熊忻
Original assignee: Beijing GK Laser Technology Co Ltd
Current assignee: Beijing GK Laser Technology Co Ltd
Priority date: 2012-05-14
Filing date: 2012-05-14
Publication date: 2012-09-12
Anticipated expiration: 2032-05-14
Also published as: CN102662203B

Abstract

The invention provides a diaphragm comprising a base part, a diaphragm hole part and a fixing mechanism, wherein the base part is provided with a guiding device and a light transmitting part; the diaphragm hole part is provided with at least one diaphragm hole; the diaphragm hole part can move on the guide device back and forth in a certain direction, so that the diaphragm hole can move back and forth in the direction; and the shape and the position of the light transmitting part are arranged to meet the conditions that the diaphragm hole can be randomly moved to the position and the diaphragm hole is not shielded; and the fixing mechanism is used for fixing the diaphragm hole part on the base part when the diaphragm hole part is moved to the needed position relative to the base part.

Description

A kind of diaphragm

Technical field

The present invention relates to a kind of diaphragm that is used for optical field, be specifically related to the variable diaphragm of a kind of height and clear aperture.

Background technology

Diaphragm is an optical element commonly used in a kind of optical field.Traditional diaphragm is generally disc, and its structure is as shown in Figure 1, and the disc diaphragm can rotate by O around the center of circle, and its circumference has circle hollow out circular hole not of uniform size, i.e. aperture.The height of center of this aperture relies on the O rotation adjusting around the center of circle.Be example with aperture A, as shown in Figure 2, when aperture A when left figure turns to right figure, the center hypermutation of aperture h, horizontal range has also become L ' by L with respect to center of circle O simultaneously.Thereby find out, the shortcoming of this diaphragm have following some:

1) vertical direction changes the variation that (dimension that is the height of center place) has influence on horizontal direction.For example when regulating height of center, coarse adjustment has been satisfied, the diaphragm base is fixed, and fine tuning height of center again, height of center one becomes, and aperture position in the horizontal direction also changes simultaneously, loose again diaphragm base, adjusting aperture position in the horizontal direction.This process wastes time and energy.

2) when changing the aperture of the diaphragm, height of center can't be reorientated accurately.The aperture of for example finding 1mm is improper, need change the hole of another bore, because this diaphragm is not with scale, need remeasure.Like this, both inconvenience and benchmark had change.

Summary of the invention

Therefore, the objective of the invention is to overcome the shortcoming of above-mentioned existing diaphragm, a kind of diaphragm is provided, be convenient to accurately regulate height of center, and clear aperture is variable.

The present invention provides a kind of diaphragm, comprising:

Base portion has guide piece and transmittance section on it;

Aperture portion; Has at least one aperture on it; Aperture portion can move back and forth on a certain direction along said guide piece; Thereby said aperture can be moved back and forth on said direction, and the shape of said transmittance section and position are set to when aperture moves in the optional position, all can not block aperture;

Fixed mechanism is used for when aperture portion moves to desired location with respect to base portion, and portion is fixed on the base portion with aperture.

According to diaphragm provided by the invention; Wherein said guide piece is groove or guide rail; Wherein said groove has two relative sidewalls; Said sidewall extends along the said direction that moves back and forth, and these two sidewalls contact with the both sides of aperture portion respectively, with the moving direction of snoot hole portion in the motion of aperture portion.

According to diaphragm provided by the invention, wherein when aperture portion comprised a plurality of aperture, the direction that moves back and forth of a plurality of apertures edge described aperture portion was arranged.

According to diaphragm provided by the invention, wherein said transmittance section is the groove that penetrates base portion.

According to diaphragm provided by the invention, wherein also has the scale of the direction that the moves back and forth setting of edge described aperture portion on the base portion.

According to diaphragm provided by the invention, wherein also have in the aperture portion and the corresponding index line of each aperture, be used to indicate the position of aperture with respect to base portion.

According to diaphragm provided by the invention; Wherein said fixed mechanism comprises fixed block and screw; Said aperture portion is sandwiched between said fixed block and the said base portion; Said aperture portion has along said and moves back and forth the mounting groove that direction is extended, and screw passes fixed block, said mounting groove and base portion, so that aperture portion is fixed on the base portion.

According to diaphragm provided by the invention, wherein said fixed mechanism is the groove on the base portion, and this groove is simultaneously as guide piece, and the width of this groove is identical with the width of said aperture portion, and said aperture portion cooperates with the sidewall friction of said groove.

According to diaphragm provided by the invention, has flexible material on the sidewall of wherein said groove.

Diaphragm provided by the invention can be regulated the height of center of aperture fast and accurately; Can not cause simultaneously the variation of position on the aperture horizontal direction; Can select the aperture of different bores as required, and reselect the height of center that to locate aperture behind the aperture fast.

Description of drawings

Followingly the embodiment of the invention is described further with reference to accompanying drawing, wherein:

Fig. 1 is the structural representation of circular iris of the prior art;

Fig. 2 is the structural representation in use of the diaphragm shown in Fig. 1;

Fig. 3 is the structural representation according to the diaphragm of the embodiment of the invention 1;

Fig. 4 a and 4b are respectively the front elevation and the schematic cross-section of the base portion of the diaphragm among Fig. 3;

Fig. 5 is the structural representation of the aperture portion of the diaphragm among Fig. 3;

Fig. 6 is the blast three-dimensional structure diagram according to the diaphragm of the embodiment of the invention 2;

Fig. 7 is the schematic perspective view after the diaphragm among Fig. 6 is fixed.

Embodiment

Embodiment 1

Present embodiment provides a kind of diaphragm, and its structure is as shown in Figure 3, comprising:

Base portion 01; Its front elevation shown in Fig. 4 a, Fig. 4 b be among Fig. 4 a along the sectional view of A-A line, have groove 03 on it; Groove 03 vertically extends; And the boundary of groove 03 has scale 06 (in Fig. 3 and Fig. 4 a, illustrating with heavy line), and the part bottom of groove 03 is formed bar shaped transmittance section 07 by hollow out;

Aperture portion 02, its structure is as shown in Figure 5, has the aperture 04 of the different vertical arrangement being aligned in a plurality of apertures on it; Aperture portion 02 is arranged in groove 03; Can move up and down along groove 03, thereby aperture 04 07 is moved up and down along the transmittance section, therefore can not blocked; The width of the width of aperture portion 02 and groove 03 is roughly the same; Aperture portion 02 cooperates with the sidewall friction of groove 03, when aperture portion moves to suitable position, can be fixed on the base portion 01 through friction force, and aperture portion 02 has the index line 05 of horizontal direction in a side of each aperture 04; The extended line of this index line is crossed the center of aperture 04, is used to identify the height of aperture 04.

In use, can be with respect to base portion 01 and slip aperture portion 02, through index line being aimed at required scale, thereby make the pairing aperture of this index line be positioned at required height, adjust to required height with this aperture with required aperture.

The diaphragm that present embodiment provides is convenient to regulate the height of center of aperture; And move the position on can the occurred level direction in adjustment process; Time saving and energy saving, owing to have scale on the base portion, therefore can accurately adjust the height of center of aperture; Therefore when the aperture of aperture is improper, can make things convenient for, accurately change the suitable aperture in aperture.

Embodiment 2

Present embodiment provides a kind of diaphragm, and its blast structure is as shown in Figure 6, comprising:

Base portion 11 has groove 13 on it, groove 13 vertically extends, and the boundary of groove 13 has scale, and the part bottom of groove 13 is formed bar shaped transmittance section 17 by hollow out, has threaded hole b in the non-openwork part of groove;

Aperture portion 12 has the aperture 14 and the bar shaped mounting groove 121 of the different vertical arrangement being aligned in a plurality of apertures on it, aperture portion 12 is arranged in groove 13, can move up and down along groove 13, thereby aperture 14 17 is moved up and down along the transmittance section;

Fixed block 18 has threaded hole a on it, screw 19 passes threaded hole a, mounting groove 121 and threaded hole b successively, thereby through fixed block aperture portion is fixed on the base portion.

Diaphragm in the present embodiment also has 1 similar index line and the scale with embodiment, and is not shown in Fig. 6 for clarity.

In use, unclamp screw 19, with respect to base portion 11 and slip aperture portion 12; Through index line being aimed at required scale; Thereby make the pairing aperture of this index line be positioned at required height, adjust to required height with this aperture with required aperture, height control well after; Tighten screw 19, aperture portion is fixed on the base portion.The structure of the diaphragm after fixing is as shown in Figure 7.

The diaphragm that present embodiment provides is convenient to regulate the height of center of aperture, and the position on can the occurred level direction in adjustment process moves, and is time saving and energy saving, therefore when the aperture of aperture is improper, can make things convenient for, accurately change the suitable aperture in aperture.

According to other embodiments of the invention, wherein fixing with the screw retention except that above-mentioned friction force, also can adopt other fixed form fixed aperture hole portion and base portion.

According to other embodiments of the invention, wherein some guide piece also can serve as stationary installation, has for example played the effect of stationary installation simultaneously as the groove of guide piece among the embodiment 1.

According to other embodiments of the invention; Wherein the groove in the base portion can play the effect of guiding; But the groove in the base portion is not to be necessary, can adopt other guide piece to lead yet and makes aperture portion in the vertical direction move back and forth, for example guide rail etc.

According to other embodiments of the invention, wherein the shape of the transmittance section in the base portion is not limited to bar shaped, gets final product so long as when aperture portion moves to the optional position, all can make base portion can not cause to block to aperture.

According to other embodiments of the invention, wherein under situation, can on the sidewall of the groove of base portion, the material that can increase friction force be set, like flexible materials such as rubber, plastics like the frictional fit among the embodiment 1.

In the above-described embodiments, relative position between each parts and the description that relatively moves suppose that all the aperture in the vertical direction moves back and forth for ease.But in practical application, aperture is moved back and forth in any direction, the relative position between wherein each parts remains unchanged; For example; Can as required aperture portion along continuous straight runs be moved back and forth, thereby regulate aperture position in the horizontal direction.

Among the present invention; Through adopt base portion and and base portion between can be along the structure of the aperture portion that a certain direction moves back and forth, overcome the shortcoming that aperture change in location in one direction in the existing circular iris can cause the change in location of aperture on another direction.In addition, in the pinpoint application of needs, scale can be set on base portion, thereby make the aperture can accurate localization.

It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is specified with reference to embodiment; Those of ordinary skill in the art is to be understood that; Technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. diaphragm comprises:

Base portion has guide piece and transmittance section on it;

2. diaphragm according to claim 1; Wherein said guide piece is groove or guide rail; Wherein said groove has two relative sidewalls; Said sidewall extends along the said direction that moves back and forth, and these two sidewalls contact with the both sides of aperture portion respectively, with the moving direction of snoot hole portion in the motion of aperture portion.

3. diaphragm according to claim 1, wherein when aperture portion comprised a plurality of aperture, the direction that moves back and forth of a plurality of apertures edge described aperture portion was arranged.

4. diaphragm according to claim 1, wherein said transmittance section are the groove that penetrates base portion.

5. diaphragm according to claim 1 wherein also has the scale that is provided with along the direction that moves back and forth of described aperture portion on the base portion.

6. diaphragm according to claim 1 wherein also has in the aperture portion and the corresponding index line of each aperture, is used to indicate the position of aperture with respect to base portion.

7. diaphragm according to claim 1; Wherein said fixed mechanism comprises fixed block and screw; Said aperture portion is sandwiched between said fixed block and the said base portion; Said aperture portion has along said and moves back and forth the mounting groove that direction is extended, and screw passes fixed block, said mounting groove and base portion, so that aperture portion is fixed on the base portion.

8. diaphragm according to claim 1, wherein said fixed mechanism are the groove on the base portion, and this groove is simultaneously as guide piece, and the width of this groove is identical with the width of said aperture portion, and said aperture portion cooperates with the sidewall friction of said groove.

9. diaphragm according to claim 8 has flexible material on the sidewall of wherein said groove.