DE-R 383 Diffractive Optical Element
-Element Number: DE-R 383
-Current Product Revision: A
-Description: Quasi Continuous Line - 51
-Number of Spots on Line: 1935
-Substrate Material: Polycarbonate (PC)
-Size (Ø x Thickness): 8 x 0.63 mm
-Design Wavelengths: 840 nm
-Recommended Wavelength Range: 790-880 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 spacing next to center @ 100 mm Distance
Spot spacing next to line end @ 100 mm Distance
Pattern Angle
λ [nm]
a [mm]
[µm]
[µm]
α [°]
687
74.7
36
44
40.9
752
82.9
40
50
45.0
801
89.3
42
55
48.1
825
92.6
43
58
49.7
840
94.6
44
60
50.6
893
102.1
47
67
54.1
940
109.0
49
73
57.2
980
115.1
52
79
59.9
1064
128.9
56
94
65.6
1550
257.0
82
351
104.2
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 TM (min)
0-Order Intensity TM (typ.)
0-Order Intensity TM (max)
0-Order Intensity TE (min)
0-Order Intensity TE (typ.)
0-Order Intensity TE (max)
684
10.5%
11.0%
11.5%
13.8%
14.4%
14.7%
749
2.5%
2.9%
3.4%
4.8%
5.1%
5.4%
800
0.4%
0.5%
0.9%
1.2%
1.5%
1.7%
845
0.3%
0.3%
0.4%
0.4%
0.5%
0.7%
893
1.2%
1.4%
1.5%
0.7%
0.8%
1.0%
940
2.8%
3.4%
3.7%
1.7%
2.1%
2.3%
980
4.9%
5.2%
5.5%
3.2%
3.5%
3.7%
描述 [描述] Design Wavelengths: 840 nm