Optical Window/Filter: Diameter Tolerance ±0.05 mm

Component Specifications

Definition

An optical window/filter is a precision optical component integrated into photodetector modules to selectively transmit desired wavelengths of light while attenuating or blocking unwanted wavelengths. It serves as both a protective barrier for sensitive photodetector elements and a spectral filtering element that improves signal-to-noise ratio by eliminating interference from ambient light or other sources. These components are engineered with specific bandpass, longpass, or shortpass characteristics to match the spectral sensitivity of the photodetector and the application requirements.

Working Principle

Operates based on optical interference, absorption, or reflection principles. Thin-film coatings or doped materials create wavelength-selective transmission properties. When light strikes the filter, constructive and destructive interference at specific wavelengths determines which portions of the spectrum are transmitted through to the photodetector, while unwanted wavelengths are reflected or absorbed.

Materials

Typically made from optical-grade substrates (fused silica, borosilicate glass, sapphire, or optical polymers) with dielectric thin-film coatings (titanium dioxide, silicon dioxide, hafnium oxide) or colored glass filters (Schott, Hoya). Coatings are applied using physical vapor deposition (PVD) or chemical vapor deposition (CVD) processes.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bandwidth	10-50 nm (narrowband) or 100-400 nm (broadband)
Blocking OD	OD4-OD6 (optical density)
Parallelism	<3 arcminutes
Surface Quality	40-20 scratch-dig
Peak Transmission	>85%
Coating Durability	MIL-C-48497 or equivalent
Diameter Tolerance	±0.05 mm
Transmission Range	Typically 200-2000 nm (UV-VIS-NIR)
Thickness Tolerance	±0.1 mm

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 14997, DIN 3140, MIL-PRF-13830B

Parent Products

This component is used in the following industrial products

Photodetector Module

A modular electronic component that converts incident light into an electrical signal.

View Product Details

Engineering Analysis

Risks & Mitigation

Coating degradation from UV exposure
Surface contamination reducing transmission
Mechanical damage from improper handling
Thermal stress causing cracks
Delamination of thin-film coatings

FMEA Triads

Trigger: Improper cleaning methods
Failure: Scratches or coating damage
Mitigation: Implement strict cleaning protocols using approved materials and techniques

Trigger: Thermal cycling beyond specifications
Failure: Cracking or delamination
Mitigation: Design for thermal expansion compatibility and specify operating temperature ranges

Trigger: Moisture ingress
Failure: Fogging or corrosion
Mitigation: Use hermetic sealing and desiccants in packaging

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±2% on center wavelength, ±5% on bandwidth for standard filters

Test Method

Spectrophotometry (UV-VIS-NIR), interferometry for surface flatness, environmental testing per MIL-STD-810

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Optical Window/Filter

Manufacturer profiles associated with Optical Window/Filter.

Sourcing Optical Window/Filter from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Dielectric Layer

Insulating layer in surface mount capacitors that stores electrical energy through polarization.

Optical Window

Transparent optical component for light transmission in polycarbonate lens housings

PCB Substrate

PCB substrate is the foundational insulating layer that provides mechanical support and electrical connectivity for electronic components in high-speed memory modules.

Edge Connector

Edge connector is a printed circuit board (PCB) connector that mates with the edge of another PCB, commonly used in high-speed memory modules for reliable electrical connections.

Frequently Asked Questions

What is the difference between an optical window and an optical filter?

An optical window primarily provides physical protection and broad-spectrum transmission with minimal optical effect, while an optical filter selectively transmits specific wavelengths and blocks others to modify the spectral content reaching the photodetector.

How do I select the right optical filter for my photodetector application?

Consider the detector's spectral sensitivity, the target wavelength range, required bandwidth, transmission efficiency, environmental conditions (temperature, humidity), and mechanical constraints (size, mounting). Consult manufacturer datasheets and application notes for optimal matching.

What maintenance do optical windows/filters require?

Regular cleaning with appropriate optical cleaning solutions and lint-free wipes, inspection for scratches or coating damage, and protection from harsh chemicals and physical impact. Avoid touching optical surfaces with bare hands.

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.

Optical Window/Filter