Home Products Measurement & Analysis InstrumentsOptical InstrumentsOther Optics Instruments

Square Custom Sapphire Optical Blank

group nameSapphire Optical Windows
Min Order1 piece
brand nameFELIX GLASS optical glass Manufacturing base
modelFG-SAPP-SIGHT-HP-001
payment methodL/C, D/A, D/P, T/T
update timeFri, 17 Jul 2026 17:43:11 GMT

contact supplier

Paramtents

Base Material Optical Grade Single Crystal Sapphire (C-Plane Standard, Other Orientations Available)
Shape & Outline Standard Square, Rectangular, Custom Irregular Profile Supported
Thickness Range 0.1 mm – 60 mm, Custom Ultra-Thin / Heavy Thickness Available
Surface Finish As-Cut Blank, Single/Double-Sided Optical Polishing, Optional AR Coating
Edge Processing Raw Cut, Safety Chamfer, Countersink, Slot, Notch, CNC Profiling
Application Field Precision Instruments, Machine Vision, LiDAR, Semiconductor Inspection, Custom Optical Assemblies
Custom Machining Service OEM ODM Size Cutting, Drilling, Laser Marking, Silk-Screen Printing

Packging & Delivery

Weight0.25kg / piece
Min Order1 piece

Briefing

High pressure resistant polished sapphire sight, corrosion-proof observation window for industrial furnaces & pressure vessels.

Detailed

Attention

Product Overview

Felix Glass Co., Limited supplies square and rectangular optical-grade single-crystal sapphire blanks for drawing-based optical and industrial assemblies. Parts can be delivered as-cut, single-side polished, or double-side polished, with custom thickness, edge work, holes, slots, notches, marking, and optional anti-reflection coating reviewed against the customer drawing.

Direct answer: Available directions include C-plane sapphire as the standard orientation, thickness from 0.1 mm to 60 mm, square sizes up to 400 mm × 400 mm, flatness options from λ/4 to λ/10 depending on polishing grade, and custom CNC features. Final tolerances depend on size, thickness, geometry, coating, inspection method, and service conditions.

For finished observation-window formats, compare the high-pressure resistant sapphire sight glass. The broader Sapphire Optical Windows category covers additional window configurations.

square custom sapphire optical blank supplied by Felix Glass for drawing-based optical assemblies — Square sapphire blank geometry can be coordinated with the clear aperture, mounting area, edge condition, and downstream processing plan.

Interest

Core Technical Specification Table

The values below retain the available customization directions in the existing product information. The purchase drawing should define the acceptance criteria used for production and inspection.

Parameter	Available Direction	Engineering Review Note
Base material	Optical-grade single-crystal sapphire; C-plane standard	Other crystal orientations can be reviewed.
Shape and outline	Square, rectangular, or drawing-defined irregular profile	Provide corner radius, datum, and outline tolerance.
Thickness range	0.1 mm to 60 mm	Feasibility depends on part size, handling, and machining features.
Surface finish	As-cut, single-side polished, or double-side polished	State surface quality, roughness, flatness, and clear aperture.
Flatness option	λ/4 to λ/10 based on polishing grade	Specify test wavelength and measurement aperture.
Maximum square size	Up to 400 mm × 400 mm	Confirm thickness, usable area, packaging, and transport needs.
Optional coating	Broadband anti-reflection coating	Provide wavelength, angle of incidence, coated side, and target.
Edge processing	Chamfer, countersink, slot, notch, or CNC profiling	Include feature locations and position tolerances.

polished rectangular and square sapphire optical blanks with controlled edge finishing — Surface finish and edge preparation can be selected for customer secondary machining or direct assembly after drawing review.

Interest

Core Technical Advantages

Flexible Size and Thickness

Ultra-thin sheets and thicker high-rigidity blanks can be evaluated for compact sensors, optical instruments, and industrial assemblies.

Multiple Surface Supply Modes

Choose an as-cut blank for customer processing or a factory-polished surface to reduce downstream preparation steps.

Mohs 9 Hardness

Sapphire provides strong scratch resistance and chemical stability for exposed optical surfaces and repeated handling.

Controlled Optical Geometry

Flatness, parallelism, surface quality, and clear aperture can be coordinated with the intended optical path.

Pre-Machining Options

Chamfers, holes, slots, notches, profiling, laser marking, and border printing can be reviewed before delivery.

When reflection control is part of the design, review the AR-coated sapphire protection window as a related configuration.

custom sapphire blank prepared for precision optical polishing and CNC machining — Blank condition, machining allowance, polishing grade, and inspection scope should be defined before production.

Interest

Full Custom CNC Machining Capacity

Blank Preparation

Cut square, rectangular, or irregular blanks with process allowance planned for the finished geometry.

Precision Profiling

Use diamond-tool CNC processing for outlines, holes, slots, notches, chamfers, and countersinks.

Optical Finishing

Apply single-side or double-side polishing around the required flatness, parallelism, and surface quality.

Marking and Coating

Evaluate laser marking, silk-screen printing, and optional AR coating for the assembly and optical requirement.

For a thinner finished part, compare the ultra-thin polished sapphire glass cover.

Felix Glass custom machined sapphire square blank with polished faces and drawing-defined edges — Machined features are reviewed together with blank thickness and surface requirements to plan a practical production route.

Desire

Wide Cross-Industry Application Scenarios

Precision Instruments

Custom sapphire plates for optical measurement, encoder, microscope, and laboratory assemblies.

Machine Vision and LiDAR

Durable blanks for imaging and ranging windows where outline and optical geometry are drawing controlled.

Semiconductor Inspection

Hard, chemically stable optical access parts for inspection modules and process equipment.

Industrial Observation

Blanks intended for engineered sight-window assemblies after pressure, temperature, sealing, and housing review.

Medical and Laboratory Devices

Small optical windows for sensing and inspection equipment with application-specific documentation needs.

A related medical-device format is the custom C-plane sapphire flat window.

square sapphire optical blank for machine vision industrial observation and precision instruments — The same sapphire base material can support different assemblies through changes in thickness, outline, surface finish, and optional coating.

Desire

Production & Quality Inspection Standards

Drawing and material reviewConfirm sapphire orientation, dimensions, tolerance, quantity, surface finish, and service conditions.
Dimensional verificationCheck thickness, outline, feature position, chamfer, and other drawing-defined dimensions.
Optical inspectionEvaluate flatness, parallelism, surface quality, and transmission when included in the order specification.
Final surface and edge reviewScreen for scratches, chips, edge defects, marking, coating condition, and packaging readiness.

Prototype and production quantities can be discussed. Lead time is confirmed after the drawing, quantity, coating, and inspection scope are reviewed.

Company and manufacturing background is available on the About Felix Glass page.

Desire

Frequently Asked Questions

Can the sapphire blank be supplied without optical polishing?

Yes. As-cut blanks can be supplied for customer secondary processing. Single-side and double-side polishing are also available.

What shapes can be reviewed?

Square, rectangular, and drawing-defined irregular profiles can be evaluated with holes, slots, notches, chamfers, and countersinks.

Is anti-reflection coating available?

Broadband AR coating can be reviewed. Provide the wavelength range, angle of incidence, coated side, and performance target.

Can this blank be used in a pressure sight-window assembly?

It can be evaluated as the sapphire optical element, but allowable pressure is determined by the finished thickness, clear aperture, edge support, seal, housing, temperature, safety factor, and applicable design requirements. No pressure rating should be assumed without assembly-level engineering review.

What information is needed for a quotation?

Provide a drawing, dimensions, thickness, quantity, crystal orientation, surface quality, flatness, feature tolerances, coating, and operating conditions.

Can Felix Glass support prototype quantities?

Prototype and production quantities can be discussed after the engineering requirements and inspection plan are defined.

Desire

Drawing Information for Engineering Review

Overall length, width, thickness, corner radius, and quantity
Crystal orientation, clear aperture, and surface finish
Flatness, parallelism, surface quality, and inspection wavelength

Hole, slot, notch, chamfer, countersink, and datum details
Coating range, coated side, angle, and optical target
Mounting, sealing, pressure, temperature, chemical, and packaging conditions

Action

Engineering Support & Inquiry Guide

Felix Glass Co., Limited supports drawing-based sapphire cutting, CNC machining, optical polishing, marking, coating, inspection, and packaging for US-market and global B2B projects.

Send the drawing, quantity, thickness, tolerance, surface requirement, coating target, and operating conditions for a feasibility review and project-specific quotation.

Send Your Sapphire Blank Drawing