Industry-Verified Manufacturing Data (2026)

Precision Optical Encoder Grating Disc

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Precision Optical Encoder Grating Disc used in the Manufacture of Measuring, Testing, Navigation and Control Equipment sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Precision Optical Encoder Grating Disc is characterized by the integration of Glass Substrate and Chrome Grating Layer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Borosilicate Glass construction to support stable, high-cycle operation across diverse manufacturing scenarios.

High-resolution glass disc with etched radial patterns for angular position sensing

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for Precision Optical Encoder Grating Disc

Definition
A precision-engineered glass disc featuring microscopic radial gratings etched onto its surface. This component serves as the core sensing element in optical rotary encoders, converting mechanical rotation into precise digital position signals. It enables accurate angular measurement in closed-loop control systems for industrial automation, robotics, and CNC machinery. The disc's pattern quality directly determines encoder resolution, accuracy, and repeatability.
Working Principle
Light passes through or reflects off the radial grating pattern, creating interference patterns detected by photodiodes. As the disc rotates, the alternating transparent/opaque lines modulate light intensity, generating electrical pulses proportional to angular displacement.
Common Materials
Borosilicate Glass, Chrome Coating
Technical Parameters
  • Total grating lines determining base resolution (lines/revolution) Standard Spec
  • Grating pitch accuracy affecting signal integrity (μm) Standard Spec
Components / BOM
  • Glass Substrate
    Provides dimensional stability and optical clarity
    Material: Borosilicate Glass
  • Chrome Grating Layer
    Forms light-blocking radial pattern through etching
    Material: Vacuum-deposited Chrome
  • Anti-Reflective Coating Optional
    Reduces stray light reflections for improved signal contrast
    Material: Magnesium Fluoride
  • Protective Overcoat Optional
    Shields grating from environmental contamination and abrasion
    Material: Silicon Dioxide
Engineering Reasoning
0-10000 RPM with 0.1 arc-second angular resolution
Pattern deformation exceeding 50 nm RMS surface roughness or 0.5 μm radial runout
Design Rationale: Thermal expansion mismatch between borosilicate glass substrate (α=3.3×10⁻⁶/K) and chromium etching (α=4.9×10⁻⁶/K) causing pattern distortion at ΔT>80°C
Risk Mitigation (FMEA)
Trigger UV radiation exposure exceeding 1000 W/m² for >1000 hours
Mode: Photoresist degradation causing 20% contrast loss in diffraction efficiency
Strategy: Hermetic sealing with UV-blocking fused silica window (transmission cutoff at 200 nm)
Trigger Centrifugal stress exceeding 120 MPa at disc periphery
Mode: Radial crack propagation from micro-etching defects
Strategy: Ion-beam etching with <5 nm edge roughness and compressive stress layer deposition

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Precision Optical Encoder Grating Disc.

encoder code disc optical grating wheel rotary scale disc high-resolution optical encoder grating disc borosilicate glass encoder disc chrome coating precision angular position sensing grating optical encoder disc for measurement equipment chrome-etched radial pattern encoder disc

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar
other spec: Max rotational speed: 10,000 RPM, Resolution: Up to 50,000 lines/revolution
temperature: -40°C to +85°C
Media Compatibility
✓ Clean air environments ✓ Sealed optical encoder housings ✓ Precision laboratory equipment
Unsuitable: Abrasive particulate-laden atmospheres
Sizing Data Required
  • Required angular resolution (lines/revolution)
  • Shaft diameter and mounting method
  • Required operating speed range (RPM)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Contamination-induced signal degradation
Cause: Accumulation of dust, oil, or debris on the grating surface, leading to optical interference, reduced light transmission, and erroneous position readings.
Mechanical wear or misalignment
Cause: Physical damage from vibration, shock, or improper installation causing disc warping, scratches, or misalignment relative to the read head, resulting in signal loss or inaccuracy.
Maintenance Indicators
  • Intermittent or erratic position readings or encoder output errors
  • Audible grinding or scraping noises during rotation
Engineering Tips
  • Implement a clean, sealed environment with proper filtration to prevent contaminants from reaching the grating surface, and use protective covers if exposed.
  • Ensure precise mounting and alignment during installation, and regularly check for mechanical stability to minimize vibration and shock impacts.

Compliance & Manufacturing Standards

Reference Standards
ISO 230-2:2014 (Geometric accuracy of machines) ANSI/ASME B89.1.12 (Dimensional measuring equipment) DIN 876 (Flatness and parallelism of measuring surfaces)
Manufacturing Precision
  • Bore diameter: +/-0.005mm
  • Grating pitch uniformity: +/-0.1μm
Quality Inspection
  • Interferometric flatness test
  • Optical diffraction efficiency measurement

Factories Producing Precision Optical Encoder Grating Disc

Verified manufacturers with capability to produce this product in China

Add your factory

✓ 95% Supplier Capability Match Found

P Project Engineer from Brazil Jan 17, 2026
★★★★★
"Impressive build quality. Especially the Grating Resolution (lines/rev) is very stable during long-term operation."
Technical Specifications Verified
S Sourcing Manager from Canada Jan 14, 2026
★★★★★
"As a professional in the Manufacture of Measuring, Testing, Navigation and Control Equipment sector, I confirm this Precision Optical Encoder Grating Disc meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from United States Jan 11, 2026
★★★★★
"Standard OEM quality for Manufacture of Measuring, Testing, Navigation and Control Equipment applications. The Precision Optical Encoder Grating Disc arrived with full certification."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

6 sourcing managers are analyzing this specification now. Last inquiry for Precision Optical Encoder Grating Disc from UAE (59m ago).

Frequently Asked Questions

What are the key applications for this precision optical encoder grating disc?

This disc is designed for high-accuracy angular position sensing in measuring instruments, industrial automation systems, robotics, navigation equipment, and precision control devices requiring reliable position feedback.

How does the chrome coating enhance the encoder disc performance?

The chrome coating provides excellent contrast for optical reading systems, ensures precise etching of radial patterns, offers durability against environmental factors, and maintains consistent reflectivity for reliable signal generation.

What specifications should I consider when selecting this encoder disc?

Key specifications include disc diameter, grating resolution (lines/revolution), line pitch accuracy, mounting bore diameter, operating temperature range, and surface flatness to ensure compatibility with your optical encoder system requirements.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Manufacture of Measuring, Testing, Navigation and Control Equipment sector.

Get Quote for Precision Optical Encoder Grating Disc

Request technical pricing, lead times, or customized specifications for Precision Optical Encoder Grating Disc directly from verified manufacturing units.

Your business information is encrypted and only shared with verified Precision Optical Encoder Grating Disc suppliers.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Thank you! Your message has been sent. We'll respond within 1–3 business days.

Need to Manufacture Precision Optical Encoder Grating Disc?

Connect with verified factories specializing in this product category

Add Your Factory Contact Us
Previous Product
Precision Inertial Measurement Unit (IMU) Sensor Module
Next Product
Precision Pressure Transducer Sensing Element