CN202362478U - Reflecting prism - Google Patents
Reflecting prism Download PDFInfo
- Publication number
- CN202362478U CN202362478U CN2011205055341U CN201120505534U CN202362478U CN 202362478 U CN202362478 U CN 202362478U CN 2011205055341 U CN2011205055341 U CN 2011205055341U CN 201120505534 U CN201120505534 U CN 201120505534U CN 202362478 U CN202362478 U CN 202362478U
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- right angle
- reflecting
- plane
- main body
- prism
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Abstract
The utility model discloses a reflecting prism which comprises a right angle triangular pyramid main body, wherein the right angle triangular pyramid main body comprises an A right angle surface, a B right angle surface and an inclined surface; the A right angle surface is provided with three fixing holes, the fixing holes pass through the inclined surface, and a groove is reserved on the edge of the joint of the B right angle surface and the inclined surface; and the inclined surface is separated into four reflecting surfaces through the fixing holes, and the surfaces of the reflecting surfaces are respectively coated with reflecting films and protecting films. The inclined surface of the right angle triangular pyramid main body is separated into the four reflecting surfaces through the fixing holes, and the surfaces of the reflecting surfaces are respectively coated with the reflecting films and the protecting films; and when light is out of the reflecting surfaces, an astigmatism phenomenon or a light angle can not exist, thereby achieving the purpose of simple structure, reasonable design and good reflecting effect.
Description
Technical field
The utility model relates to optical instrument field, is specifically related to a kind of reflecting prism.
Background technology
Optical system such as optical take-up apparatus or photographic system is made up of various opticses, as one of its component parts, is useful on the reflecting prism that changes light path.As reflecting prism, use the prism that forms reflectance coating in the one side of prism, or do not use reflectance coating and utilize the prism that the refringence between air and prism reflects in prism inside (below, be referred to as the internal reflection prism).
In recent years, the densification of optical system becomes necessary problem, therefore, uses the internal reflection prism usually, and can satisfy the requirement of densification.And,, therefore, preferably use the high material of refractive index because the internal reflection prism utilizes refringence.Like this, remove light at random aspect obtain favourable effect, on this point, be able to use the internal reflection prism.
Above-mentioned internal reflection prism forms by the plane of incidence with light incident with from the reflecting surface of the light of plane of incidence incident reflection with at the prism of the triangle column of the light outgoing of reflecting surface reflection.At this moment, produce astigmatic aberration or angular (focal shift, aberrations such as light spot image deterioration) at light transmission and even during reflecting the plane of incidence, reflecting surface and going out reflecting surface.Astigmatism aberration or focal power are taken place by the surface accuracy of above-mentioned 3 faces.The surface accuracy of prism is made by plane lapping, to a certain extent, also can face be approached the plane, but can not be as desirable flat state.For this reason, aberration taking place inevitably, causes problems such as light spot image deterioration.Especially show on the reflecting prism.
The utility model content
For solving the problems of the technologies described above; We have proposed a kind of reflecting prism; Be divided into four reflectings surface through the hole that is fixed, the inclined-plane with said right angle triangular pyramid main body; And be coated with reflectance coating and diaphragm respectively on said reflecting surface surface, make astigmatic phenomenon or angular can not occur when light goes out reflecting surface.
For achieving the above object, the technical scheme of the utility model is following:
A kind of reflecting prism comprises right angle triangular pyramid main body, and said right angle triangular pyramid main body comprises A right angle face, B right angle face and inclined-plane; Said A right angle face is provided with three fixed orifices, and said fixed orifice passes said inclined-plane, and stays groove at said B right angle face and junction, said inclined-plane seamed edge; The hole that is fixed, said inclined-plane is divided into four reflectings surface, and is coated with reflectance coating and diaphragm respectively on said reflecting surface surface.
Preferably, said fixed orifice is the I shape hole.
Preferably, said reflectance coating is silver-plated thin layer.
Preferably, said diaphragm is a thin layer of silicon dioxide.
Pass through technique scheme; The utility model is divided into four reflectings surface through the hole that is fixed, the inclined-plane that makes said right angle triangular pyramid main body; And be coated with reflectance coating and diaphragm respectively on said reflecting surface surface; Make astigmatic phenomenon or angular can not occur when light goes out reflecting surface, thereby reach purpose simple in structure, reasonable in design, that reflecting effect is good.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the main TV structure synoptic diagram of the disclosed a kind of reflecting prism of the utility model embodiment;
Fig. 2 is the disclosed a kind of reflecting prism perspective view of the utility model embodiment;
Fig. 3 is the disclosed a kind of reflecting prism side-looking structural representation of the utility model embodiment.
The numeral corresponding component title represented among the figure with letter:
1. face 12.B right angle, right angle triangular pyramid main body 11.A right angle face
13. inclined-plane 2. fixed orifices, 3. grooves, 4. reflectings surface
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of reflecting prism; Its principle of work is to make the hole that is fixed, the inclined-plane of said right angle triangular pyramid main body be divided into four reflectings surface; And be coated with reflectance coating and diaphragm respectively on said reflecting surface surface, make astigmatic phenomenon or angular can not occur when light goes out reflecting surface.
Below in conjunction with embodiment and embodiment the utility model is done further detailed explanation.
Embodiment.
Like Fig. 1, Fig. 2 and shown in Figure 3, a kind of reflecting prism comprises right angle triangular pyramid main body 1, and said right angle triangular pyramid main body 1 comprises A right angle face 11, B right angle face 12 and inclined-plane 13; Said A right angle face 11 is provided with three I shape fixed orifices 2, and said fixed orifice 2 passes said inclined-plane 13, and face 12 stays groove 3 with said inclined-plane 13 junction seamed edges at said B right angle; The hole 2 that is fixed, said inclined-plane 13 is divided into four reflectings surface 4, and is coated with reflectance coating and diaphragm respectively on said reflecting surface 4 surfaces.Wherein, said reflectance coating is silver-plated thin layer; Said diaphragm is a thin layer of silicon dioxide.
Incident light see through from A right angle face 11 to reflecting surface 4 with go out reflecting surface during face 4 is divided into four because inclined-plane 13 is reflected, and will weaken to produce astigmatic aberration or angular (focal shift, aberrations such as light spot image deterioration).Astigmatism aberration or focal power are taken place by the surface accuracy of above-mentioned 3 faces.The surface accuracy of prism is made by plane lapping, to a certain extent, also can face be approached the plane, but can not be as desirable flat state.For this reason, aberration taking place inevitably, cause problems such as light spot image deterioration, especially shows on the reflecting prism.Therefore, have only, incident light is separated at groove 3 places avoids through reflecting surface 4 is cut apart.In order to increase reflecting effect, on reflecting surface 4, be coated with silver-colored thin bed reflections film, on silver-plated thin bed reflections film, being coated with diaphragm again, that it is protected is fixing, prevents to come off.
Pass through technique scheme; The utility model is divided into four reflectings surface 4 through the hole 2 that is fixed, the inclined-plane 13 with said right angle triangular pyramid main body 1; And be coated with reflectance coating and diaphragm respectively on said reflecting surface 4 surfaces; Make astigmatic phenomenon or angular can not occur when light goes out reflecting surface 4, thereby reach purpose simple in structure, reasonable in design, that reflecting effect is good.
To the above-mentioned explanation of disclosed a kind of reflecting prism embodiment, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (4)
1. a reflecting prism is characterized in that, comprises right angle triangular pyramid main body, and said right angle triangular pyramid main body comprises A right angle face, B right angle face and inclined-plane; Said A right angle face is provided with three fixed orifices, and said fixed orifice passes said inclined-plane, and stays groove at said B right angle face and junction, said inclined-plane seamed edge; The hole that is fixed, said inclined-plane is divided into four reflectings surface, and is coated with reflectance coating and diaphragm respectively on said reflecting surface surface.
2. a kind of reflecting prism according to claim 1 is characterized in that, said fixed orifice is the I shape hole.
3. a kind of reflecting prism according to claim 2 is characterized in that, said reflectance coating is silver-plated thin layer.
4. a kind of reflecting prism according to claim 3 is characterized in that, said diaphragm is a thin layer of silicon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205055341U CN202362478U (en) | 2011-12-07 | 2011-12-07 | Reflecting prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205055341U CN202362478U (en) | 2011-12-07 | 2011-12-07 | Reflecting prism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362478U true CN202362478U (en) | 2012-08-01 |
Family
ID=46573656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205055341U Expired - Fee Related CN202362478U (en) | 2011-12-07 | 2011-12-07 | Reflecting prism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362478U (en) |
-
2011
- 2011-12-07 CN CN2011205055341U patent/CN202362478U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20141207 |
|
| EXPY | Termination of patent right or utility model |