Crystal prism type beam divergence angle inductor

A beam divergence angle and sensor technology, applied in optics, instruments, optical components, etc., can solve the problems of lack of ideal devices, dependence on equipment accuracy and experimental conditions, etc., and achieve the effect of wide angle perception range

Inactive Publication Date: 2014-12-31
QUFU NORMAL UNIV
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Problems solved by technology

Divergence angle detection usually adopts focal spot method, aperture method, pinhole scanning method, threshold intensity method, focal plane CCD method, etc. The basic principle is to complete indirectly by measuring the spot size, and the spot contour boundary recognition method affects the test accuracy. A key factor; the divergence angle can also be measured by polarized light interferometry, BBO crysta

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  • Crystal prism type beam divergence angle inductor

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Embodiment Construction

[0008] As shown in the figure, the optical-grade iceland stone crystals without inclusions and boils are selected, and after directional cutting, grinding and polishing, they are respectively made into rectangular prism 1, rectangular prism 2, rectangular prism 3, and rectangular prism 4. The light of each prism The axis and angle errors are controlled within 1′, wherein the structural angle of rectangular prism 1 and rectangular prism 2 is set to 38°, and the structural angle of rectangular prism 3 and rectangular prism 4 is 39°. Right-angle prism 1 and right-angle prism 2 are glued together with neutral resin to form a spectroscopic system. After gluing, adjust the parallelism between the front and rear light-passing surfaces so that the beam deviation angle is less than 3′; For the partial interference system, the thickness of the air gap is controlled at about 20um, the main sections of the two prisms must be kept parallel, and the parallelism between the front and rear lig...

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Abstract

The invention relates to an Iceland spar crystal prism type beam divergence angle inductor and belongs to beam divergence angle measuring devices. The beam-divergence angle inductor satisfying divergence angle measuring of large-aperture beams or small-divergence beams comprises a right-angle prism structure and a prism combination manner. The optical axes of the right-angle prisms 1, 3 and 4 are vertical to a right-angle edge and parallel with an incident end face, the optical axis 2 of the right-angle prism 2 is vertical to the right-angle edge and an emergent end face, the structural angle alpha of the right-angle prism 1 and the right-angle prism 2 ranges from 35 degrees to 40 degrees, the structural angle beta of the right-angle prism 3 and the right-angle prism 4 ranges from 38.5 degrees to 39 degrees, the right-angle prism 1 and the right-angle prism 2 form a beam splitting system through optical bonding, the right-angle prism 3 and the right-angle prism 4 form a deviation detecting interference system of middle air gaps, the two systems are adjusted into optical extinction states, the relative directions of the two systems are fixed, and effective one-direction use is achieved. The beam divergence angle inductor has the advantages that device end face shapes are not regulated, applicable device wave lengths range from 300 nanometers to 3500 nanometers, measurable angles range from 10 seconds to 3 degrees, extinction ration is not smaller than 1*10<-5>, and optical damage preventing threshold is 10W/cm<2>.

Description

Technical field: [0001] The invention relates to a light beam divergence characteristic detection device, in particular to a light beam divergence angle conversion measurement device for Iceland stone crystals. Background technique: [0002] The beam divergence angle is a very important technical parameter in the optical system, which determines how much light energy reaches the set target. In order to effectively exert the laser performance and increase the working distance, it is necessary to control the divergence angle of the laser beam accordingly, which involves the detection of the divergence angle. Divergence angle detection usually adopts focal spot method, aperture method, pinhole scanning method, threshold intensity method, focal plane CCD method, etc. The basic principle is to complete indirectly by measuring the spot size, and the spot contour boundary recognition method affects the test accuracy. A key factor; the divergence angle can also be measured by polar...

Claims

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Application Information

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IPC IPC(8): G01B11/26G02B27/28
Inventor 宋连科
Owner QUFU NORMAL UNIV
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