Looking for Custom Optical Components?
✔ OEM / ODM Customization
✔ Free Drawing DFM Technical Review
✔ 24-Hour Professional Quotation
✔ Flexible Low MOQ & Fast Prototypes
High Pressure Resistant Sapphire Sight Glass






Square Custom Sapphire Optical Blank | Felix Glass
Product Overview
Core Technical Specification Table
Parameter Customizable Typical Value Base Material Optical Grade Single Crystal Sapphire (C-Plane Standard) Standard Outline Square, Rectangle, custom irregular contour Thickness Range 0.1 mm – 60 mm, custom thickness upon request Surface Option Raw as-cut blank, single-sided polish, double-sided mirror polish Flatness Tolerance λ/4 ~ λ/10 based on polishing grade Max Single Size 400 mm x 400 mm square blank Optional Coating Broadband Anti-Reflection Coating Edge Machining Chamfer, countersink, slot, notch, full CNC profiling Core Technical Advantages
Full Custom CNC Machining Capacity
Wide Cross-Industry Application Scenarios
Production & Quality Inspection Standards
Frequently Asked Questions
Q1: Can you supply unpolished raw sapphire square blanks for our own secondary polishing?
Q2: What maximum square size of sapphire optical blank can you produce?
Q3: Is edge CNC profiling and drilling available on sapphire blanks before delivery?
Q4: Can I order small prototype quantities of custom square sapphire blanks?
Engineering Support & Inquiry Guide
Need Custom Optical Glass Solution?
Send us your drawing, dimension & coating requirements for fast quotation within 24 hours.
Get Free RFQCustom Precision Optical & Glass Components Manufacturer – Felix Glass Co., Limited.
We supply Industrial Glass, Sapphire Optics, Optical Lenses/Prisms/Filters, Infrared IR Optics, Functional & Display Glass, N-BK7/H-K9L Optical Glass, supporting OEM mass production and laboratory custom prototypes. Flexible MOQ & free sample service available. Fill in the form to download full datasheets and get factory wholesale price within 24 hours.
- Name
- *Title
- *Content

- What is your MOQ for custom optical glass and display glass parts?
Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.
- Can I get free glass samples for testing before bulk order?
Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.
- What is the production lead time for custom optical glass components?
What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.
- Do you offer one-stop custom optical glass processing services?
Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.
- Name
- *Title
- *Content









