High-precision multi-spectral integrated target for LED lighting and supporting optical detection method

Abstract

The invention provides a high-precision multispectral integrated target for LED (Light Emitting Diode) illumination and a matched optical detecting method. The high-precision multispectral integrated target comprises a multispectral integrated target plate, a current controllable LED light source and a collimation system, wherein the multispectral integrated target plate is mounted on a focal plane of the collimation system; the current controllable LED light source is used for supplying infrared and white glimmer illumination to the multispectral integrated target plate; a Cassegrain collimation system subjected to aberration optimization, tolerance analysis and thermal design is taken as the collimation system; cross division lines and four different resolution ratio detection patterns are integrated on the multispectral integrated target plate. According to the high-precision multispectral integrated target for LED illumination, the multispectral integrated target plate is combined with the current controllable LED light source, so that the problems of frequently exchanging and repeatedly adjusting the target plate and the light source in one-target exclusive use are solved, and the Cassegrain collimation system subjected to aberration optimization and thermal design is adopted, so that the imaging quality is optimized, the volume mass of the system is reduced and the system is higher in tolerance and thermal adaptability.

Description

technical field [0001] The invention relates to multi-optical axis parallelism detection and resolution detection, in particular to a high-precision multi-spectrum integrated target for LED lighting and a matching optical detection method. Background technique [0002] At present, optoelectronic devices are gradually developing in the direction of multi-spectrum and integration. A device usually integrates multiple detection methods such as white light, low-light and infrared. During the use of this type of equipment, it is necessary to perform multi-spectral optical axis parallelism verification and resolution detection. For the detection of multi-spectral optical axis parallelism, in the existing method, the cross reticle can be used to measure the cross reticle, which can be generated by separate illumination, or can be generated by using incandescent lamp illumination and replacing the white low-light infrared target plate, no matter which In any case, it is very easy t...

AI Technical Summary

Problems solved by technology

For the detection of multi-spectral optical axis parallelism, in the existing method, the cross reticle can be used to measure the cross reticle, which can be generated by separate illumination, or can be generated by using incandescent lamp illumination and replacing the white low-light infrared target plate, no matter which It is very easy to produce optical axis misalignment, which will affect the detection accuracy.

If the resolution detection of white micro-light and infrared light is also required, the target plate needs to be replaced and calibrated, resulting in cumbersome operation and low work efficiency

Moreover, it is difficult to control the micro-illumination and the temperature difference between the infrared target and the background when the incandescent lamp is illuminated. More importantly, when the target plate is replaced, error factors such as defocus will be introduced, and the high cost is not convenient for popularization and use.

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