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Grey cosine distribution optical target simulation device for MTF (modulation transfer function) detection

A technology of modulation transfer function and target simulation, which is applied in measuring devices, testing optical performance, optical instrument testing, etc., can solve the problems of low detection accuracy and low MTF detection efficiency, and achieve the goal of improving accuracy and efficiency and high-precision tuning Effect

Active Publication Date: 2017-05-31
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Based on this, it is necessary to provide a grayscale method for modulation transfer function detection to solve the problems of low MTF detection efficiency and low detection accuracy of space optical cameras and photoelectric imaging systems with coupled discrete sampling characteristics in the prior art. Cosine Distribution Optical Target Simulator

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  • Grey cosine distribution optical target simulation device for MTF (modulation transfer function) detection
  • Grey cosine distribution optical target simulation device for MTF (modulation transfer function) detection

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0023] Since the spatial gray information theory of equiclinic interference fringes is based on the cosine distribution, the gray cosine distribution optical target simulation device for modulation transfer function detection of the present invention is also constructed based on the interference principle. In one of the examples, as figure 1 and figure 2 As shown, the gray-scale cosine distribution optical target simulation device for modulation transfer function detection includes an illumination source 1, a narrow-band filter 2, a flat-field microscope objective lens 3, a pinhole reticle 4, and a first optical collimation system 5 , polarizing beam splitter 6, adjustable optical density plate 7, first standard plane mirror 8, second standard plane mirror 9, beam splitter 10, calibration camera 11, coupling obje...

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Abstract

The invention relates to a grey cosine distribution optical target simulation device for MTF (modulation transfer function) detection and belongs to the technical field of image quality assessment of an optical system. The device comprises a lighting source, a narrow band filter, a flat field microobjective, a pinhole reticle, a first optical alignment system, a polarization beam splitter, a variable optical density board, a first standard plane mirror, a second standard plane mirror, a beam splitter, a calibration camera, a coupling objective, a second optical alignment system, a high-precision displacement adjustment table and a controller. The grey cosine distribution optical target simulation device for modulation transfer function detection can accurately simulate a grey cosine distribution target with the space frequency and modulation degree matched with those of a to-be-detected optical system, the grey cosine distribution target is input for MTF detection of the to-be-detected optical system, which accords with the original definition of MTF, besides, MTF of the to-be-detected optical system can be directly measured, follow-up data processing is not required, and accordingly, the precision and the efficiency of MTF detection are improved.

Description

technical field [0001] The invention relates to the technical field of image quality evaluation of an optical system, in particular to a gray scale cosine distribution optical target simulation device for modulation transfer function detection. Background technique [0002] At present, space optical cameras mostly use Time Delayed Integration CCD (TDICC) to cooperate with front-end optical telescopes to obtain ground scene information. The direction of TDICCD line array corresponds to the direction of field of view of space optical cameras, and the direction perpendicular to it is In the direction of the track, the scene image is obtained by integrating TDICCD with time. During the ground test of the space optical camera, the modulation transfer function (Modulation Transfer Function, MTF) was used as the standard to quantitatively evaluate the imaging quality of the space optical camera. At present, there are many MTF testing methods. For the space optical camera using TDI...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 何煦袁理姬琪李成浩
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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