DE-R 373 Diffractive Optical Element
• Element Number: DE-R 373
• Current Product Revision: A
• Description: Random Pattern
• Number of Dots: 31806 Dots
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Minimum Recommended Beam Diameter: 2-3 mm
• Design Wavelength: 830 nm
• Recommended Wavelength Range: 820-860 nm
When the DOE is used at a wavelength different from the design wavelength, the pattern will scale in size and geometrical distortions may occur (see section ‘Geometry and Diffraction Angles▼’). When the DOE is used at a wavelength within the recommended wavelength range, the element shows the lowest intensity in the central spot (see section ‘Zero Order Diffraction Intensity▼’ on reverse page).
Geometry and Diffraction Angles
If the DOE is used at laser wavelengths close to the design wavelength (Δλ < 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
652 nm
87.4 mm
65.9 mm
84.7 mm
62.1 mm
97.0 %
94.3 %
57.2°
36.5°
687 nm
93.1 mm
69.9 mm
90.7 mm
66.5 mm
97.4 %
95.2 %
49.9°
38.5°
752 nm
104 mm
77.4 mm
103 mm
75.2 mm
98.4 %
97.1 %
55.0°
42.3°
801 nm
113 mm
83.3 mm
112 mm
82.4 mm
99.4 %
98.8 %
58.9°
45.2°
825 nm
118 mm
86.3 mm
117 mm
86.1 mm
99.9 %
99.8 %
60.9°
46.7°
846 nm
122 mm
88.9 mm
122 mm
89.5 mm
100.4 %
100.7 %
62.6°
47.9°
893 nm
131 mm
94.9 mm
133 mm
97.7 mm
101.6 %
103.0 %
66.5°
50.8°
923 nm
138 mm
98.9 mm
141 mm
104 mm
102.5 %
104.7 %
69.1°
52.6°
980 nm
151 mm
107 mm
158 mm
116 mm
104.6 %
108.4 %
74.0°
56.1°
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.
Zero Order Diffraction Intensity
Diffraction efficiencies given on this datasheet have been measured using elements of product revision A.
描述 [描述] Design Wavelength: 830 nm