Telecentric optical system of color camera for digital aerial mapping

Abstract

The invention discloses a telecentric optical system of a color camera for digital aerial mapping. The system comprises a front lens group, a diaphragm and a rear lens group, which are arranged in sequence along the incident direction of the light from the front to the back, wherein the front lens group comprises a first lens, a second lens, a third lens and a fourth lens, which are arranged in sequence front the front to the back; and the rear lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens, whichare arranged in sequence front the front to the back. The imaging field of view of the system reaches 76 DEG, the full field of view average MTF is greater than or equal to 0.6@55 lp/mm, the full field of view relative distortion is smaller than or equal to 0.05%, and the illuminance uniformity is above 72.5%, so that the image illuminance uniformity is greatly enhanced and the imaging quality isgood under the premise of ensuring the performance requirements of large-field high-resolution and low-distortion imaging. The optical system is compact in structure and has the characteristics of being small in size and low in cost.

Description

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AI Technical Summary

Benefits of technology

This technology allows for better images with less aberration at higher levels of detail compared to previous methods like lensless cameras or scanning laser beams. It achieves this by having an entire area that captures all colors simultaneously without any ghosted areas around it. Additionally, its technical effect is improving the overall brightness level on both sides while maintaining consistently accurate color reproduction over longer periods of time (high definition) due to reduced size and cost reduction.

Problems solved by technology

This patented technical problem addressed by the present inventors relating to improving the performance (higher definition) of aeronauclimbing photography cameras that capture very small areas of space over time without losing their effectiveness due to limited range coverage caused by traditional zoom lenses. Current methods involve increasing the number of pixels per unit distance but they may result in increased noise levels and reduced depth accuracy. Therefore, new designs aimed towards achieving better uniformity across all directions while maintaining good visual effects during operation.

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