Small-distortion, small-volume, high-illumination and high-resolution optical system
A high-resolution, optical system technology, applied in the field of optical systems, can solve the problems of large volume, large distortion, low illumination, etc., and achieve the effect of low edge resolution, high edge resolution, and small lens volume
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[0011] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:
[0012] An optical system with small distortion, small volume, high illuminance, and high resolution, comprising a first lens 1, a second lens 2, a third lens 3, and a fourth lens 4 arranged in sequence. A diaphragm 6 is provided between the four lenses 4, the first lens 1 and the third lens 3 are spherical lenses made of glass materials, and the second lens 2 and the fourth lens 4 are aspheric lenses made of optical plastic materials. The focal lengths of the first lens 1, the third lens 3 and the fourth lens 4 are positive, the focal length of the second lens 2 is negative, and the second surface 8 of the second lens 2 is curved toward the image plane, as shown in the figure Show.
[0013] The small distortion is mainly achieved by the following four methods: 1. The second lens 2 adopts a negative lens with a larger curvature; 2. An aspheric surface ...
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