An emitting optical system design for laser panorama detection
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Opto-electronics Information Engineering Department, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
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Received Date:
2012-07-06
Accepted Date:
2012-07-24
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Abstract
In order to improve the beam characteristics of high-power laser diode, whose beam quality is quite different in fast axis and slow axis, a set of emitting shaping system was designed through theoretical analysis and software simulation based on geometrical optics of refraction. As beam divergence of fast axis and slow axis is changed by cylindrical lens separately, the beams radiate in the meridional direction to the narrow field of view, and cover the field of view of ±30° in the sagittal direction. Meanwhile, a prism of special structure was added in the shaping system to mix light. Consequently, the uniformity of energy distribution of the output beam became greater than 75% within the target area, and the energy utilization rate reached to 80% or more. The results show that a single emitting system can complete the detection of ±30° field of view within the work distance of 15m, and six emission systems constitute a 360° field of view to complete panorama detection. This result is helpful for improving the accuracy of the laser active detection and increasing its scope.
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