DE-R 350 Diffractive Optical Element
• Element Number: DE-R 350
• Current Product Revision: A
• Description: 15 Lines (Rectangular)
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design Wavelengths: 520 nm
• Recommended Wavelength Range: 480-550 nm
• Minimum Recommended Beam Diameter: 1.5-2 mm
Within the recommended wavelength range, the zeroth order central spot is not visible on the line. This Large-angle pattern is subject to geometrical distortion due to its symmetry properties, if the DOE is used at laser wavelengths significantly different (∆λ > 50nm) from the design wavelength. Pattern size and pattern angles and the intensity in the undiffracted central spot ('zero order intensity', see reverse page) will vary most with the wavelength. Diffraction efficiencies given on this datasheet have been measured using elements of product revision A.
Geometry and Diffraction Angles
If the DOE is used at laser wavelengths close to the design wavelength (∆λ < 50nm) the geometrical distortion is usually tolerable (see table below).
Wavelength
Pattern Size @ 100 mm Distance
Ratio corner-to-center
Pattern Angles
wc
hc
wE
hE
Width
Height
θH
θv
448 nm
36.1 mm
42.9 mm
35.8 mm
42.6 mm
99.2 %
99.4 %
20.5°
24.2°
520 nm
42.1 mm
50.2 mm
42.1 mm
50.2 mm
100 %
100 %
23.8°
28.2°
532 nm
43.2 mm
51.4 mm
43.2 mm
51.4 mm
100.1 %
100.1 %
24.4°
28.8°
592 nm
48.3 mm
57.6 mm
48.8 mm
58.0 mm
101.0 %
100.7 %
27.1°
32.2°
635 nm
52.0 mm
62.2 mm
52.9mm
62.9 mm
101.6 %
101.1 %
29.2°
34.6°
660 nm
54.2 mm
64.9 mm
55.3 mm
65.9 mm
102.0 %
101.4 %
30.3°
36.0°
685 nm
56.4 mm
67.7 mm
57.8 mm
68.8 mm
102.5 %
101.8 %
31.5°
37.4°
Setup
Laser diodes are the most common light source to be used with diffractive optical elements, but other laser light sources may also be used.
The DOEs are best used with collimated or convergent laser sources. The microstructure surface should be oriented towards the laser.
The 0-order spot is equivalent in size and shape to the original beam, but its power is attenuated.
Diffraction Zero Order Intensity:
描述 [描述] Design Wavelengths: 520 nm