Depolarized reflector

A mirror and depolarization technology, applied in condensers, optics, instruments, etc., can solve the problems of depolarization effect, narrow spectral band, and inability to adjust the incident angle of light at will.

Active Publication Date: 2008-12-31
HANGZHOU EVERFINE PHOTO E INFO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Coating the surface of the mirror is a common method for depolarizing the mirror at present. However, this method is expensive on the one hand, and on the other hand, this method can only reduce the polarization problem caused by the above-mentioned specular reflection to a certain extent. The reflection after coating The reflectance difference between the p-wave and s-wave of the mirror group still exists, and the spectral band applicable to the depolarization of the coating is narrow, and the incident angle is limited. The incident angle of the light cannot be adjusted arbitrarily, otherwise the depolarization effect will be affected

Method used

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Embodiment 1

[0083] Such as image 3 A schematic diagram of an embodiment of the depolarizing reflector of the present invention is shown. The depolarizing reflector in this embodiment is only composed of one group of mirrors, that is, a polarizing reflector 1 and a compensating reflector 2 . The compensating reflector 2 directly receives the reflected light beam from the polarizing reflector 1 . The polarizing reflector 1 has the same optical performance as the compensating reflector 2, and the plane formed by the incident light 5 of the polarizing reflector 1 and the normal 6 of the polarizing reflector 1 is the polarizing incident plane, so that the compensating reflector 2 The plane formed by the incident light 7 and the normal line 8 of the compensating mirror 2 is the compensating incident plane, and the incident angle θ of the polarizing mirror 1 1 After the polarized incident plane and the polarized incident plane are determined, the orientation of the compensation mirror can be u...

Embodiment 2

[0085] Such as Figure 4 The schematic diagram of another embodiment of the shown depolarizing mirror group of the present invention, this embodiment is similar to the embodiment shown in Figure 2, in this embodiment, the light incident angle is θ 1 is 45°. After the incident light 5 enters the polarizing reflector 1 set at 45° between the normal line 6 and the horizontal plane in the vertical downward direction, the reflected light becomes incident on the compensating reflector 2 in the horizontal direction, and the compensating reflector 2 is perpendicular to the horizontal plane, and the compensation reflector The projection of the normal 8 of the mirror and the normal 6 of the polarizing mirror on the horizontal plane forms an angle of 45°, and the reflected light of the compensating mirror 2 and the reflected light of the polarizing mirror 1 are emitted in a horizontal direction at an angle of 90°. At this time, in order to meet the conditions of the depolarizing mirror ...

Embodiment 3

[0087] Such as Figure 5 The schematic diagram of the third embodiment of the depolarizing mirror assembly of the present invention is shown. The optical path of the depolarizing reflector of the present invention only includes one set of mirror groups, which consists of two polarizing reflectors 1 and 3 and one compensating reflector 2 . The reflected light of the first polarizing reflector 1 is the incident light of the second polarizing reflector 2 , and the light passing through the second polarizing reflector 2 is reflected into the compensating reflector 2 . The incident light 5 of the first polarizing reflector 1 and the first polarized incident plane formed by the normal line 6 are the same as the second polarized incident plane formed by the incident light 9 of the second polarized reflector 2 and the normal line 10. The incident plane is perpendicular to the compensating incident plane formed by the incident light 7 and the normal 8 of the first compensating mirror....

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Abstract

The invention discloses a depolarization reflecting mirror, comprising a mirror group which is arranged on an optical path and consists of at least a polarization reflecting mirror and at least a compensation reflecting mirror; a polarization incident plane and a compensation incident plane are vertical to each other; the product of the reflectance ratios of s-wave and p-wave of all polarization reflecting mirrors in the mirror group is equal to that of all compensation reflecting mirrors; in the optical path, the mirror group can be arranged in single group or more groups. The depolarization reflecting mirror of the invention can conveniently and effectively eliminate the polarization problem caused by the reflection of the mirror surface.

Description

【Technical field】 [0001] The invention relates to an optical measurement or optical instrument, in particular to a reflector group capable of effectively eliminating the polarization problem caused by specular reflection. 【Background technique】 [0002] Specular reflection at an angle of incidence changes the polarization state of the reflected light relative to the incident light, and its total reflectivity varies with the polarization state of the incident light. Such as figure 1 Shown is a schematic diagram of the polarization of a beam of natural light emitted after specular reflection. [0003] The plane formed by the incident light and the normal of the reflector is the incident plane. Any beam of incident light can be decomposed into two polarized lights perpendicular to the propagation direction of the light, which are denoted as s-wave and p-wave, where the vibration direction of the s-wave is perpendicular to the incident plane, and the vibration direction of the...

Claims

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Application Information

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IPC IPC(8): G02B17/06
CPCG02B5/3066G02B19/0019G02B19/0033G02B19/0047G02B27/286
Inventor 潘建根
Owner HANGZHOU EVERFINE PHOTO E INFO
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