Grating Surface: Groove Density 300-2400 lines/mm

Component Specifications

Definition

A grating surface is a critical optical component featuring a precisely patterned array of parallel grooves or lines on a substrate, designed to diffract incident light into multiple beams at specific angles determined by the grating equation. This component enables wavelength separation, spectral analysis, and beam steering in applications ranging from spectroscopy to laser systems.

Working Principle

Operates on the principle of diffraction: when light strikes the periodic structure, it interferes constructively at angles satisfying nλ = d(sinθ_i + sinθ_m), where n is the diffraction order, λ is wavelength, d is groove spacing, θ_i is incidence angle, and θ_m is diffraction angle. This disperses light into its constituent wavelengths.

Materials

Typically made from fused silica, borosilicate glass, or metal substrates (e.g., aluminum, gold) with coatings like aluminum or dielectric layers to enhance reflectivity. Grooves are formed via mechanical ruling, holographic exposure, or etching processes.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Dimensions	Custom (e.g., 25x25 mm to 100x100 mm)
Blaze Angle	Customizable (e.g., 5°-30°)
Groove Density	300-2400 lines/mm
Surface Flatness	λ/10 at 632.8 nm
Coating Reflectivity	>85% in specified range

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 10110, ISO 14999, DIN 3140

Parent Products

This component is used in the following industrial products

Diffraction Grating

An optical component with a periodic structure that splits and diffracts light into several beams traveling in different directions.

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Engineering Analysis

Risks & Mitigation

Surface contamination reducing efficiency
Mechanical damage to grooves
Thermal expansion affecting alignment
Coating degradation over time

FMEA Triads

Trigger: Improper handling during installation
Failure: Scratches or contamination on grating surface
Mitigation: Use cleanroom protocols, protective covers, and trained personnel for handling and mounting.

Trigger: Environmental exposure to humidity or chemicals
Failure: Coating corrosion or substrate degradation
Mitigation: Apply protective coatings, control storage conditions, and use sealed enclosures in operation.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Groove spacing tolerance ±0.5%, angular accuracy ±0.1°

Test Method

Interferometry for surface flatness, spectrophotometry for efficiency, and microscopy for groove inspection per ISO 10110.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Grating Surface

Manufacturer profiles associated with Grating Surface.

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Frequently Asked Questions

What is the difference between ruled and holographic grating surfaces?

Ruled gratings are mechanically engraved, offering high efficiency at specific blaze angles, while holographic gratings are created via interference patterns, providing lower stray light and better uniformity for broad spectral applications.

How does groove density affect grating performance?

Higher groove density increases angular dispersion and resolution but reduces free spectral range; selection depends on the required wavelength coverage and spectral resolution in the application.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Grating Surface