DE-R 369 Diffractive Optical Element
- Element Number: DE-R 369
- Current Product Revision: A
- Description: Quasi Continuous Line - 36
- Number of Spots on Line: 1501
- Substrate Material: Polycarbonate (PC)
- Size (Ø x Thickness): 8 x 1.2 mm
- Design Wavelengths: 639 nm
- Recommended Wavelength Range: ###-### nm
- Minimum Recommended Beam Diameter:1.5 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
515 nm
51 mm
68.6 µm
29°
532 nm
53 mm
71 µm
30°
639 nm
65 mm
86.6 µm
36°
650 nm
66 mm
88.3 µm
37°
730 nm
75 mm
100.6 µm
41°
780 nm
81 mm
108.6 µm
44°
801 nm
84 mm
112.0 mm
46°
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)
447
43%
46%
49%
40.7%
44.0%
47.1%
532
11.9%
13.7%
15.7%
16.5%
18.7%
21.4%
638
0.3%
0.9%
1.6%
1.1%
2.3%
3.8%
652
0.3%
0.6%
1.1%
0.9%
1.6%
2.6%
687
0.4%
1.0%
1.8%
0.2%
0.9%
2.0%
752
2.9%
4.0%
4.9%
1.2%
2.4%
3.6%
800
6.3%
7.5%
9.2%
3.1%
5.0%
6.5%
描述 [描述] Design Wavelengths: 639 nm