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Aberration compensating method for 45 degree color separation filter transmission color separation light path

A compensation method and technology of color separation film, which is applied to the aberration correction of the transmission color separation optical path of the 45 degree color separation film, and the aberration compensation field of the transmission color separation light path of the 45 degree color separation film, which can solve the imaging of the reflection color separation light path Impact, focal length impact, reduction of light transmission efficiency of the optical system, etc., to achieve the effect of reducing technical difficulty, avoiding impact, and improving light transmission efficiency

Active Publication Date: 2011-02-16
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this aberration compensation method, due to the use of multiple lenses, the light transmission efficiency of the optical system is reduced. Secondly, the aberration compensation lens group generally has a certain optical power, which affects the focal length of the entire imaging system, and then makes the reflection component The imaging of the color light path is affected
Therefore, in the design of the optical system, it is necessary to continuously adjust the design parameters of the reflection and transmission color separation optical paths to obtain a satisfactory design result, which greatly increases the difficulty of the design of the optical system.

Method used

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  • Aberration compensating method for 45 degree color separation filter transmission color separation light path
  • Aberration compensating method for 45 degree color separation filter transmission color separation light path
  • Aberration compensating method for 45 degree color separation filter transmission color separation light path

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Embodiment 1

[0012] According to attached figure 1 (a) shows the optical system diagram of the aberration compensation method of the 45-degree color separation plate transmission color separation optical path, and we give a specific design embodiment of the off-axis lens 3 through optical axis translation.

[0013] The technical parameters of the main optical system 1 in the embodiment are as follows:

[0014] Focal length (f): 300mm;

[0015] Relative caliber (D / f): 1:2;

[0016] Field of view: 0.4°;

[0017] Working wavelength: 0.4-0.8μm (visible), 2.5-2.9μm (infrared).

[0018] The technical parameters of 45 degree color separation film 2 are as follows:

[0019] Separation chip substrate material: germanium;

[0020] Substrate thickness: 5mm;

[0021] Color separation characteristics: 0.4-0.8μm (reflection), 2.5-2.9μm (transmission);

[0022] Distance from the main system (S): 150mm.

[0023] Through the optical design software, we designed the specific technical parameters of ...

Embodiment 2

[0033] According to attached figure 1 (b) shows the optical system diagram of the aberration compensation method of the 45-degree color separation plate transmission color separation optical path, and we give a specific design embodiment of the off-axis lens 3 by tilting the optical axis.

[0034] The technical parameters of the main optical system 1 in the embodiment are as follows:

[0035] Focal length (f): 300mm;

[0036] Relative caliber (D / f): 1:2;

[0037] Field of view: 0.4°;

[0038] Working wavelength: 0.4-0.8μm (visible), 2.5-2.9μm (infrared).

[0039] The technical parameters of 45 degree color separation film 2 are as follows:

[0040] Separation chip substrate material: germanium;

[0041] Substrate thickness: 5mm;

[0042] Color separation characteristics: 0.4-0.8μm (reflection), 2.5-2.9μm (transmission);

[0043] Distance from the main system (S): 150mm.

[0044] Through the optical design software, we designed the specific technical parameters of the o...

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Abstract

The invention discloses a chromatic aberration compensation method of a 45-degree color separation filter transmission color separation optical path and is used for compensating the chromatic aberration of the 45-degree color separation filter transmission color separation optical path. The invention adopts a method of inserting a spherical lens with zero focal power in off-axis arrangement in the 45-degree color separation filter transmission color separation optical path to compensate the system chromatic aberration induced by the color separation filter. The chromatic aberration compensation method has the advantages that the light transmission rate of the system is high and does not influence the focus of the main system.

Description

technical field [0001] The present invention relates to optical elements and optical system design technology, and specifically refers to an aberration compensation method for the transmission color separation optical path of a 45-degree color separation film, which is suitable for the transmission color separation light path of a 45-degree color separation film in a multi-spectral imaging optical system Aberration correction. Background technique [0002] In the multi-spectral imaging optical system, a 45-degree color separation film is usually used to separate the wide-spectrum imaging beam of the main optical system, that is, the color separation film will reflect the imaging beam containing a part of the band to form a reflection color separation optical path; The imaging beam transmits to form a transmission color separation optical path. On the transmission color separation optical path, the transmission of the aberration-corrected imaging beam from the main optical s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00
Inventor 李兴隆刘辉裴云天
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI