Flat laser beam splitting film based on composite material and its design method
A composite material and beam splitting film technology, applied in optics, optical components, instruments, etc., can solve the problems of increasing the thickness of the film, and achieve the effect of increasing the laser damage threshold, reducing requirements, and high refractive index
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[0041] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0042] Taking an incident angle of 45 degrees, s polarization component, and a transmittance of 50±1% at 1053 nm as an example, a flat-plate laser beam splitter film based on composite materials and its design method of the present invention are illustrated.
[0043] The design method specifically includes the following steps:
[0044] 1) Parameter setting: the design transmittance value T of the laser beam splitting film D =50%, beam incident angle θ=45°, incident beam is s-polarized component, at 1053nm center wavelength, quartz substrate refractive index n S =1.4378, HfO 2 The refractive index of the material n A =1.9088, Al 2 o 3 The refractive index of the material n B = 1.5910, SiO 2 The refractive index of the material n C=1.4212, the initial film structure is S|dL(HL) g HmL|A, where S represents the substrate, H represents the high refr...
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