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Wed May 17 2017
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Dispersion Prism

dispersive prism

Dispersive prisms are used to break up light into its constituent spectral colors because the refractive index depends on frequency; the white light entering the prism is a mixture of different frequencies, each of which gets bent slightly differently. Blue light is slowed down more than red light and will therefore be bent more than red light.

Type of dispersion prisms

- Equilateral Dispersion Prism: 60°- 60°- 60°
- Isoscele Prism: 30°- 60°- 90°
- Littrow Prism: 30°- 60°- 90° with one side HR coating
dispersive prism - Pellin-Broca Prism: 90° -75° 135° -60°, features with Brewster angle input and output, bend light by 90°. It is good for laser beams separation such as SHG, THG.
- Ultafast Laser Dispersion Prism Pair - These Dispersion Prism Pairs are used to compensate for spectral dispersion that occurs in ultrafast laser systems. The prism pair are matched to within a few arc seconds and are designed so that the input and output angles are both at Brewster's Angle.
- Compound Dispersion Prism such as Amici Prism - A compound prism is a set of multiple triangular prism elements placed in contact, and often cemented together to form a solid assembly. The use of multiple elements gives several advantages to an optical designer: One can achieve spectral dispersion without causing the deviation of the beam at the design wavelength. Thus, light at the design wavelength which enters at an angle with respect to the optical axis, exits the prism at the same angle with respect to the same axis. This kind of effect is often called "direct vision dispersion" or "nondeviating dispersion".

Dispersion Prism General Specifications:

1) Material: N-SF10, Fused Silica, CaF2, Germanium, ZnSe etc.
2) Size: 4 to 100mm
3) Dimension Tolerance: +/-0.1mm
4) Angle Tolerance: <3 arc min
5) Clear Aperature: 90%
6) Flatness: < λ/4 @633 nm
7) Surface Quality: 60-40, 20-10, 10-5
8) Coating: upon customer's specification

Dispersion Prism Order Information

OptoCity offers dispersion prisms in multiple substrates for applications from Ultraviolet (UV) to Infrared IR. Calcium Fluoride (CaF2) dispersion prisms is a low index material featuring excellent transmission from 0.19 - 6.5µm, ideal for use in the Ultraviolet (UV) through Infrared (IR). Germanium (Ge) dispersion prisms is a high index material, ideal for maximizing optical paths from 3 - 12µm. Zinc Selenide (ZnSe) dispersion prisms is commonly used from 1 - 16µm, ideal for use with CO2 lasers. Please fill the following form to request for quote.


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