The invention discloses a CCD
chip modulation transfer function test device and method. The CCD
chip modulation transfer function test device mainly comprises a He-Ne
laser, an adjustable attenuator, a
beam expander, a pinhole filter, a diaphragm, a collimating lens, an improved
Michelson interferometer, a
camera obscura, an
image capture card and a PC
data processing system, wherein the He-Ne
laser, the adjustable attenuator, the
beam expander, the pinhole filter, the diaphragm and the collimating lens are arranged on the incident light path of the improved
Michelson interferometer in sequence, and the
optical axis of the He-Ne
laser, the
optical axis of the adjustable attenuator, the
optical axis of the
beam expander, the optical axis of the pinhole filter, the optical axis of the diaphragm and the optical axis of the collimating lens are arranged on the same straight line, the
camera obscura is arranged on the emergent light path of the improved
Michelson interferometer, and the PC
data processing system is connected with the
image capture card which is arranged in the
camera obscura and is connected with a CCD. Incident light is processed through the CCD
chip modulation transfer function test device to form parallel light, and goes out in a sine interference fringe mode through the improved Michelson interferometer, a sine interference
fringe pattern is used as a target, imaging is carried out through the CCD, and a modulation
transfer function of the CCD is obtained through a test by using the method of the ratio between the sine interference fringe contrast and the
image contrast.