Hartmann detection device for continuous sampling

Abstract

It is a Hageman detecting apparatus used to continuous sample in lens optics quality measurement, which comprises the light system, beam scanning structure, measured lens, image receiving system and system control and data process software. It is characterized by the following: the said lighting system is calibration light source with beam diameter adjustable; the said beam scanning structure comprises image screen, first step motor, one dimensional motor adjusting rack and support rack; the said image receiving system comprise CCD cameral, guiding rail, second step motor, rack and computer, wherein, the computer is connected with first step motor, second step motor, third step motor and CCD cameral through signal line.

Description

technical field [0001] The invention relates to the detection of the quality of optical components, in particular to a continuous sampling Hartmann detection device. Background technique [0002] The Hartmann detection method is a quantitative detection method to determine the quality of the inspected lens through the concentric degree of the converging beam of the inspected lens. Its main component is an opaque Hartmann diaphragm, which uses small holes at different positions on the diaphragm to divide the detection beam, so as to obtain the difference in the converging point position of the sub-beams irradiated on different areas of the inspected lens. The structure of the traditional Hartmann detection device is shown in Figure 1. The light emitted by the light source 1 illuminates the aperture diaphragm 3 through the condenser lens 2, thereby obtaining a point light source; the aperture aperture 3 is located at the front focus of the collimator 4, and the The light beam...

AI Technical Summary

Problems solved by technology

[0004] 1. Unable to measure local error

Because the small holes distributed on the diaphragm are discontinuous, some areas on the surface of the lens to be inspected cannot be sampled.

[0005] 2. Discontinuous sampling brings errors to the calculation

[0006] 3. The size of the small hole on the Hartmann diaphragm cannot be adjusted, and the measurement flexibility is poor

Due to the complexity of the large-aperture collimator, it is almost impossible to replace the detection light source, so it cannot be detected with the working wavelength of the inspected lens, resulting in indirect detection results.

Images