What are the main types of dispersing prisms and how do they differ?

Common dispersing prism types include equilateral prisms, Pellin–Broca prisms, Amici (direct-vision) prisms, and compound prisms such as Littrow configurations. Equilateral prisms provide straightforward dispersion and deviation, Pellin–Broca prisms can deflect a chosen wavelength by 90° while dispersing others, and direct-vision/compound prisms are designed to send a reference wavelength undeviated while still spectrally separating the beam.

How does material choice (e.g., N-BK7 vs fused silica) affect dispersion performance?

Glass composition determines the wavelength-dependent refractive index, typically characterized by Sellmeier coefficients, Abbe number, and partial dispersions. High-dispersion flint glasses yield larger angular separation between wavelengths but often with higher absorption in the UV, while fused silica offers low dispersion but excellent transmission from deep UV to near-IR and better resistance to high laser fluence.

Which key specifications should I consider when selecting a dispersing prism for spectroscopy or wavelength separation?

Critical parameters include apex angle, clear aperture, material dispersion over the target wavelength range, surface quality (e.g., 20-10 scratch-dig), surface flatness, and angular tolerances. For spectroscopy, you also want to examine the expected angular dispersion (dθ/dλ), beam deviation, and transmission, including AR coating performance at the wavelengths of interest.

How do I compare different dispersing prisms for a laser application with tight beam quality and damage threshold requirements?

Compare surface quality and flatness to control wavefront distortion and scattering, and verify that the specified laser damage threshold (LIDT) and AR coatings are compatible with your pulse duration, repetition rate, and fluence. Also examine wedge tolerances, transmitted wavefront error, and the material’s absorption and thermal properties to minimize beam distortion at high average power.

What factors influence lead time, pricing, and customization options for dispersing prisms?

Lead time and cost are driven by material type and availability, prism size and aperture, required tolerances (angle, flatness, surface quality), and coating complexity or spectral bandwidth. Custom options typically include non-standard apex angles, exotic or UV/IR materials, precision-polished surfaces, tight wedge tolerances, and application-specific AR or reflective coatings, all of which increase manufacturing time and unit price.

How can I find, compare, and request quotes for dispersing prisms on FindLight without creating an account?

On FindLight, navigate to Optics → Prisms → Dispersing Prisms, then use filters for material, wavelength range, dimensions, and surface/coating specs to narrow down products. You can open multiple product detail pages in new tabs to compare technical parameters side by side, and use the built-in contact or RFQ forms on each listing to message suppliers directly or request pricing and lead time information without registration.

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Optics
Prisms
Dispersing Prisms

Dispersing Prisms for Spectral Separation and Analysis

Rhomboid Prism

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Sold by: Photonchina Ships from: China

Specifications
Material:	BK7, FS, UVFS, IRFS, CaF2, F2, N-SF11, ZnSe, Ge, Other
Material:	N-BK7/N-SF11 or other glass materials
Dimensional Tolerance:	+/-0.05mm
Angle Tolerance:	±2 arc minutes
Flatness:	λ/4 @ 632.8nm

Did You Know?

Did you know dispersing prisms separate white light into its component colors by refraction? This property is fundamental to spectroscopy, where analyzing light spectra reveals material composition. Different prism materials and angles influence the degree of dispersion, enabling tailored spectral separation. Beyond science labs, dispersing prisms are vital in optical instruments like spectrometers, laser tuning devices, and wavelength selectors.

Frequently Asked Questions

A dispersing prism is an optical element that separates polychromatic light into its constituent wavelengths by exploiting material dispersion and refraction at non-parallel surfaces. When a broadband beam enters the prism, each wavelength experiences a different refractive index, so the exit angles diverge and form a spatially separated spectrum.

What Are Dispersing Prisms?

Dispersing Prisms are optical components designed to separate polychromatic light into its constituent wavelengths by exploiting material dispersion. Unlike simple beam‑steering prisms, Dispersing Prisms are optimized for angular dispersion and spectral resolution across defined wavelength ranges such as UV, visible, or NIR.

Common geometries include equilateral, isosceles, and compound prism assemblies. Materials typically used for Dispersing Prisms include N-BK7, fused silica, CaF2, and other low- or high-dispersion glasses, selected according to transmission band, environmental stability, and laser damage threshold.

Typical Specifications and Use Cases

Key specifications for Dispersing Prisms include:

Material and wavelength range: e.g., 190–2500 nm for fused silica or 350–2000 nm for N-BK7.
Apex angle and geometry: determines angular dispersion and spatial separation of spectral components.
Surface quality: typically 20-10 to 40-20 scratch-dig for laser and imaging applications.
Surface flatness: commonly λ/4 to λ/10 at a reference wavelength to minimize wavefront distortion.
Prism dimensions: clear aperture, length, and height impacting beam size and footprint.
Coatings: broadband AR coatings tailored to the operational band (e.g., 350–700 nm, 650–1050 nm).

Dispersing Prisms are used in compact spectrometers, wavelength-tunable systems, laser line separation, fluorescence detection, and general-purpose spectral analysis. They are often integrated into optical benches where alignment stability and low stray light are critical.

Buyer Guidance on FindLight

When sourcing Dispersing Prisms on FindLight, compare material and wavelength range first to ensure compatibility with your source (LED, broadband lamp, supercontinuum, or laser). Evaluate apex angle and expected angular dispersion against your required spectral resolution and detector geometry.

Check surface quality, flatness, and AR coating performance for high-sensitivity or laser-based setups. Dimensions and mounting constraints should match your existing opto-mechanical hardware and beam diameters.

FindLight lists Dispersing Prisms with detailed vendor specifications so procurement engineers and R&D teams can filter options, download datasheets, and request quotes directly from suppliers. You can contact multiple vendors, clarify tolerances or custom variants, and request pricing and lead times for Dispersing Prisms without any registration requirement.