# Optical-Grade Fused Silica Wafer – Quartz Glass Disk

> Optical-Grade Fused Silica Wafer - Quartz Glass Disk — a fused silica / quartz wafer: Optical Glass. Specs, RFQ checklist and custom sizes to drawing.

- Page: https://machiningglass.com/products/optical-grade-fused-silica-wafer-quartz-glass-disk/
- SKU: MG-A0BDBB
- Category: Glass & Quartz Wafers > Fused Silica & Quartz Wafers
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Optical-Grade-Fused-Silica-Wafer-Quartz-Glass-Disk.webp
- Updated: 2026-10-24

Product type: Flat Lens. Application: Lighting, Medical. Model: OC-0037.

## Overview

Optical-Grade Fused Silica Wafer - Quartz Glass Disk: a fused silica / quartz wafer in Optical Glass (Monocrystalline Silicon substrate). Listed geometry: diameter 1mm - 500mm (standard sizes available, custom dimensions supported), single-lens shape. Optical / electrical data: transmittance >95%. Surface quality Polished to Ra ≤ 0.01μm, no scratches, bubbles, or impurities. Listed for Temperature Measurment & Optics Applying applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.

## Specifications

| Parameter | Value |
| --- | --- |
| Material | Optical Glass |
| Substrate | Monocrystalline Silicon |
| Type | Flat Lens |
| Shape | Single-lens |
| Transmittance | >95% |
| Surface Quality | Polished to Ra ≤ 0.01μm, no scratches, bubbles, or impurities |
| Parallelism | Less Than 1 Arc Min |
| Application | Temperature Measurment & Optics Applying |
| Usage | Lighting, Medical |
| Model NO. | OC-0037 |
| Lenses Color | Clear |
| Purity | Sog-Si |
| Conductivity Type | All |
| Size Tolerance | 0/-0.15mm |
| Thickness Tolerance | +/-0.05mm |
| Surface Finish | 60-40 Scratch-Dig |
| Manufacturing Technology | Optoelectronic Semiconductor |
| Excellent mechanical strength | Sapphire has extremely high hardness and strength, with a Mohs hardness of 9, which makes it perform well in various environments and resist scratches and wear. |
| Good thermal stability | Sapphire wafers can remain stable at high temperatures and are suitable for high temperature applications. |
| High transparency | Sapphire wafers have good transparency in the visible and ultraviolet ranges and are suitable for optical components and lasers. |
| Low thermal conductivity | Although sapphire has high thermal stability, its thermal conductivity is relatively low, which makes it very useful in some applications, such as as an insulating material. |
| Excellent chemical stability | Sapphire has good tolerance to many chemicals and is suitable for use in a variety of environments. |
| Semiconductor devices | Used to manufacture LEDs, laser diodes and other optoelectronic devices, sapphire wafers are an important substrate material for blue and white LEDs. |
| Optical devices | Due to its excellent transparency, sapphire wafers are widely used in optical windows, lenses and optical components. |
| High-temperature electronic devices | Sapphire wafers can be used to manufacture high-performance electronic devices under high temperature and harsh environments. |
| Sensors | Used to manufacture high-precision sensors and detectors, especially in applications that require high temperature resistance and corrosion resistance. |
| sizes | ‌2 inches‌, ‌4 inches‌, ‌6 inches‌, etc. |
| Diameter Range | 1mm - 500mm (standard sizes available, custom dimensions supported) |
| Optical Performance | High light transmittance (≥92% for visible light), low chromatic aberration, precise focal length |
| Tolerance | Dimensional tolerance ±0.02mm, focal length tolerance ±1% |
| Coating Option | Anti-reflective coating (AR coating), hydrophobic coating, or custom coating as per request |
| Supplier | C-Laser (Taicang) Material Technology Co., Ltd. |

## Technical data

| Parameter | Value |
| --- | --- |
| ‌Material‌ | Sapphire (Al2O3) |
| ‌Crystal Structure‌ | Single crystal (Single Sapphire) |
| ‌Diameter‌ | Common sizes: ‌2 inches‌, ‌4 inches‌, ‌6 inches‌, etc. |
| ‌Thickness‌ | Typically ‌0.5 mm to 1.5 mm‌ |
| ‌Surface Roughness‌ | Ra < ‌10 nm‌ (can be finer as needed) |
| ‌Defect Density‌ | Less than ‌100 cm²‌ |
| ‌Thermal Conductivity‌ | Approximately ‌25 W/m·K‌ |
| ‌Refractive Index‌ | Approximately ‌1.76‌ |
| ‌Chemical Stability‌ | ‌Acid and alkali resistant‌ |
| ‌Operating Temperature Range‌ | High-temperature resistant, typically up to ‌1500°C |

## What to specify when you request a quote

- **Diameter and flat / notch** — listed as “0/-0.15mm”; state diameter, flat or notch and their tolerances.
- **Thickness and TTV** — listed as “+/-0.05mm”; give thickness, its tolerance and total thickness variation.
- **Polish and roughness** — listed as “Polished to Ra ≤ 0.01μm, no scratches, bubbles, or impurities”; specify single- or double-side polish and roughness.
- **Flatness, bow and warp** — quote flatness, bow and warp limits.
- **Material grade** — listed as “Optical Glass”; name the grade (JGS1/JGS2, Borofloat 33, alkali-free, sapphire orientation).

## Engineering guides for this part

For material grades and coating options, see [Fused Silica Wafer Material Selection for Precision Glass Processing](https://machiningglass.com/materials/fused-silica-wafer-material-selection-for-precision-glass-processing/). How parts like this are machined and finished is covered in [Glass Wafer Cutting, Dicing, and Coring: Precision Manufacturing Process](https://machiningglass.com/capabilities/glass-wafer-cutting-dicing-and-coring-precision-manufacturing-process/). For an application example, read [Fused Silica Glass Wafers for Precision Appliance Electronics](https://machiningglass.com/applications/fused-silica-glass-wafers-for-precision-appliance-electronics/). Before sending a drawing, check [Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica](https://machiningglass.com/resources/quartz-glass-manufacturing-controlling-thermal-conductivity-in-fused-silica/). A related standard product is [Custom Ultra-Thin Quartz Glass Disc](https://machiningglass.com/products/custom-ultra-thin-quartz-glass-disc/).

## FAQ

### What is the Optical-Grade Fused Silica Wafer - Quartz Glass Disk made of?

It is listed as Optical Glass with a Monocrystalline Silicon substrate. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.

### What sizes and thicknesses are available?

The listing gives diameter 1mm - 500mm (standard sizes available, custom dimensions supported). Custom outlines and thicknesses are made to drawing; state the tolerance you need.

### What optical or electrical performance does it have?

Listed values: transmittance >95%. Confirm the values at your operating wavelength, angle and temperature when you request a quote.

### Where is this fused silica / quartz wafer used?

Listed applications: Temperature Measurment & Optics Applying.

### What should I include in a quote request?

Include diameter and flat / notch, thickness and ttv, polish and roughness, flatness, bow and warp and material grade, plus quantity and a drawing if the part is custom.

## Request a quote

Send drawings, tolerances and quantity: https://machiningglass.com/contact/?rfq_product_id=7455#mg-rfq

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Source: Custom Precision Glass Machining — https://machiningglass.com/