Wave plates are made from materials with birefringence. The velocities of very light and common light through a birefringent material are inversely proportional to their refractive indices. The difference in speed can cause a phase difference when the two beams are recombined. At any particular wavelength, this difference depends on the thickness of the accelerometer (wave plate).The dual wavelength low-order wave plates were made of good quality crystalline quartz with quarter wave, half wave and full wave delays. All wave plates were mounted in Ø 25.4 mm black anodic alumina rings with a clear pore size of 18 mm. The polarization of the dual wavelength light source was controlled.
|Wavefront distortion，P-V||<λ/10 @ 632.8 nm|
|Retardation tolerance @20°C||±λ/300|
|Clear Aperture||Ø5 – 76.2 mm|
|AR coatings||Ravg < 0.2% on each surface|
|LIDT||>5 J/cm2 = 1064 nm， |
10 ns， 10 Hz
|Mounting||Black, white anodized metal mount|
- Wave plates designed for 800 nm and 400 nm dual wavelength settings
- Another possible configuration is that placed at 800 nm λ/2 wave plate and placed at 400 nm λ/4 wave plate.
- High injury threshold
- General thickness < 2 mm
- Compliance with RoHS