Infrared double waveband confocal optical system
A confocal optical system and dual-band technology, applied in the optical field, can solve the problems of high cost, low transmittance, and large number of chips, and achieve the effects of miniaturization, expansion of design freedom, and reduction of production costs
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[0029] In order to solve the problems of the prior art dual-band common optical path system with large number of pieces, low transmittance, complex structure, and high cost, the present invention provides an infrared dual-band confocal optical system. The following is a combination of the drawings and embodiments. The invention is described in further detail. It should be understood that the specific embodiments described here are only used to explain the present invention, but do not limit the present invention.
[0030] Such as figure 1 As shown, the embodiment of the present invention relates to an infrared dual-band confocal optical system (hereinafter referred to as the optical system), including: a first lens group G1 with a positive refractive power, a second lens group G2 with a positive refractive power, and a negative refractive power The third lens group G3 with high power and the fourth lens group G4 with positive refractive power. The optical power is the reciprocal...
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