DE-R 364 Diffractive Optical Element
• Element Number: DE-R 364
• Current Product Revision: A
• Description: Quasi Continuous Line - 45
• Number of Spots on Line: 967
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 0.63 mm
• Design Wavelengths: 940 nm
• Recommended Wavelength Range: 850-1050 nm
• Minimum Recommended Beam Diameter: 2 mm
Within the recommended wavelength range, the zeroth order is not brighter than the rest of the line. Line width and line angle 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.
Pattern Geometry and Diffraction Angles
Wavelength
Line Width @ 100 mm Distance
Spot-to-spot spacing @ 100 mm Distance
Pattern Angle
a
α
801 nm
69 mm
71.4 µm
38°
826 nm
71 mm
73.9 µm
39°
845 nm
73 mm
75.8 µm
40°
893 nm
78 mm
80.8 µm
43°
940 nm
83 mm
85.7 µm
45°
980 nm
87 mm
90.0 µm
47°
1058 nm
96 mm
98.8 µm
51°
1064 nm
96 mm
99.5 µm
51°
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:
Wavelength
0-Order
Intensity TE (min)
0-Order
Intensity TE (typ.)
0-Order
Intensity TE (max)
0-Order
Intensity TM (min)
0-Order
Intensity TM (typ.)
0-Order
Intensity TM (max)
751
21.1%
21.5%
22.0%
13.8%
14.1%
14.4%
801
12.1%
12.6%
12.9%
6.6%
7.0%
7.2%
826
10.0%
10.0%
10.1%
4.8%
5.0%
5.0%
845
7.2%
7.4%
7.5%
3.1%
3.2%
3.3%
893
3.5%
3.6%
3.7%
1.1%
1.2%
1.3%
923
2.1%
2.1%
2.3%
0.5%
0.6%
0.7%
980
0.6%
0.6%
0.6%
0.6%
0.6%
0.7%
1058
0.6%
0.7%
0.7%
2.5%
2.5%
2.6%
描述 [描述] Design Wavelengths: 940 nm