Equipment for CCD (Charge Coupled Device) modulation transfer function test and testing method of equipment

Abstract

The invention provides equipment for a CCD (Charge Coupled Device) modulation transfer function test and a testing method of the equipment, which relate to the field of CCD imaging quality detection. The equipment comprises a halogen lamplight source chamber, a monochromator, an integrating sphere device, a reticle part, a large numerical aperture microscope objective device, a three-dimensional CCD adjusting frame and a CCD to be detected. The monochromator and the integrating sphere device output uniform monochromatic light, the large numerical aperture microscope objective device is used for imaging, the reticle part with a specific space frequency is imaged on a light sensitive face of a CCD imaging electronics system, and a CCD modulation transfer function is figured out by numerical code values of black and white strips collected according to an image. According to the invention, the CCD modulation transfer function is evaluated by utilizing white light and each spectrum of monochromatic light, and the imaging quality of different sceneries by the CCD can be comprehensively analyzed and evaluated; a stepping motor carries out multidimensional adjustment on the reticle part and the CCD, thus reducing the working amount of the CCD modulation transfer function test; and the equipment has a compact structure and is convenient and simple to operate.

Description

technical field [0001] The invention relates to the field of CCD imaging quality detection, in particular to a device for testing CCD modulation transfer function and a testing method thereof. Background technique [0002] As an important part of the CCD camera, the quality of the CCD device directly affects the imaging quality of the entire CCD camera. People generally use MTF to evaluate the imaging quality of the CCD device itself, which is not only conducive to evaluating the CCD device itself, but also conducive to evaluating the overall optical imaging quality of the CCD camera. For different scenes on the ground, the application of spectral analysis to evaluate CCD imaging can better reflect the real scene. It is of great practical significance to study the test method of optical modulation transfer function (MTF) of CCD devices. [0003] The prior art closest to the present invention is the microscopic objective lens projection method to measure TDICCD mentioned in ...

AI Technical Summary

Problems solved by technology

[0004] Since the filter used in this method only has a certain range of wavelengths and the range of the spectrum is relatively large, it is impossible to obtain monochromatic light in each spectrum, so that for the CCD modulation transfer function test, only white light or monochromatic light in individual spectrums is used to The evaluation of the CCD modulation transfer function is not objective, and the monochromatic light with a large spectral range obtained in this method cannot comprehensively analyze and evaluate the imaging quality of different scenes in the real world after passing through the CCD

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