COMPARISON OF THE CALCULATED WORKING RANGE OF THE THIRD GENERATION EOS AND MATRIX FOR NEAR IR RANGE

In the course of work on the master's thesis the analysis of daytime and night-time devices was carried out. The analysis showed that devices based on CCD-matrixes prevail in this segment, but the devices of this type cannot be fully called night devices, because the sensitivity of the matrixes used in their designs does not allow to observe without illumination at natural night illumination of 10-3 lux. It is known that IR illumination is a strong unmasking factor.EOS can provide acceptable image quality in natural nightlight. But their use in day-night devices has limitations. Under prolonged exposure to high light, the photocathode of EOS quickly becomes unusable, so when developing a day-night device must provide EOS protection from daylight. Thus it was decided to use CMOS-matrix as an image receiver in the night channel. This, in turn, solves several problems at once. When using the photoreceiver there is no need for mechanical switching between the channels, as there is no danger of light. Also the spectral range of sensitivity of CMOS-matrixes is much more various than that of CCD and EOS that allows to pick up an optimum range of frequencies and to refuse illumination at normal night illumination. In this article a comparison of the calculated range of detection of the device on the basis of EOS of 3 generation with the device in which as the image receiver CMOS-matrix is used.

Research on Structural Design and Optimization of Artificial Optical Compound Eye

A novel curved artificial optical compound eye structure is proposed, which needs to be manufactured by ultra-precision machining due to the application of aspheric in the design. In this artificial compound eye, each of the micro-lens has an aspheric surface instead of spherical surface, which leads to a reduction of spherical aberration from 400μm to 75μm. The focal length of micro-lens is decided by its own position and equals to the distance between base surface and image receiver. The sructural parameters of micro-lens were calculated according to the theory of geometrical optics. The model of artificial compound eye was built and verified by ray tracing. Finally, the result shows that the novel curved artificial compound eye can improve imaging resolution and imaging quality at the edge effectively, and the proposed structure is feasible.