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30° - 60° - 90° Littrow Prisms have apex angles of 30°, 60°, and 90°, respectively. They are usually made of optical glass and, thanks to their specific optical properties, they reflect and refract light internally, enabling the selection and separation of specific wavelengths.
Payment :
T/T PaymentProduct Origin :
ChinaShipping Port :
Fuzhou, China
30° - 60° - 90° Littrow Prisms
Ray deviation: 60° (coated)
Ideal as a dispersion prism (uncoated)
Optical property: enables retroreflection
| Specifications: | |
| Material: | N-BK7; UV Fused Silica; other optical glass |
| Dimension Tolerance: | ±0.1 mm (standard); ±0.05 mm (high precision) |
| Surface Quality: | 60-40 S/D (standard); 10-5 S/D (high precision) |
| Flatness: | λ/4@632.8 nm(standard); λ/8@632.8 nm(high Precision) |
| Angle Deviation: | ±3 arcmin (standard); ±30 arcsec (high precision) |
| Clear Aperture: | >85% of the nominal dimension |
| Bevel: | <0.25 mm×45° |
| Coating: | Reflection coating, AR coating, etc., upon request |
Different shapes, glass types, and coating requirements are available.
Scope of use:
(1) Spectroscopic analysis: in spectrometers, Littrow prisms are often used as dispersive elements to disperse incident polychromatic light into monochromatic beams in different directions according to wavelength.
(2) Laser technology: used for wavelength selection and beam shaping, selecting a specific laser wavelength from a broad laser spectrum to improve laser monochromaticity.
(3) Optical instrument calibration: used to calibrate the wavelength accuracy and angular accuracy of other optical instruments.
(4) Optical imaging: used to adjust the optical path and improve image quality.


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