DOE를 이용해 제작한 Brazing 용 광학계

NEW  Homogenizer element for brazing applications.
This special element creates 2 small leading rays for cleaning/preheating and 1 large uniform beam that equally distributes the energy over the brazing wire to achieve better melting.
 
The single diffractive element can replace the need for several lasers and complex opto-mechanical elements. (맨 아래 그림)
This product is based on our Homogenizer element and shares its advantages: no sensitivity to incident beam size, shape, polarization, beam quality or alignment.

Wavelength  1070 nm
Incident beam size  14 mm
M^2 10
Main EFL 200 mm
EFL of refractive lens 
Main beam size 600 um
Stripping beam size 200 um
Relation between main and stripping beams 8
Grating period  713 um
Stripping beam from center period 1070 um
 

Simulation properties:

Simulation parameters Value
Wavelength 1070 nm
Incident beam 14 mm
M2 10
Beam profile Gaussian
EFL 200 mm
Propagation method Physical optics
Simulation resolution 100um
 

Output properties:
Efficiency:  90 %
Main beam ~ 600 um (shape identical to incident beam, size and intensity ratio can be controlled by design)
Stripping beam size ~200 um (equal to diffraction limited spot size of incident beam)

아래는 위와 같은 빔을 만들기 위해 기존에 사용했던 방법입니다.

아래와 같은 효과적인 결과를 도출해 냈었습니다.  이를 DOE를 이용해 쉽게 구현할 수 있게 되었습니다.