# Optical Glass IR Silicon Si Wafer Windows

> Optical Glass IR Silicon Si Wafer Windows — a glass wafer: Silicon, Silicon Windows. Specs, RFQ checklist and custom sizes to drawing.

- Page: https://machiningglass.com/products/optical-glass-ir-silicon-si-wafer-windows/
- SKU: MG-2949D4
- Category: Glass & Quartz Wafers > Glass & Borosilicate Wafers
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Optical-Glass-IR-Silicon-Si-Wafer-Windows.webp
- Updated: 2026-10-24

Product type: Optical Windows. Application: Lighting, Medical, Optical, Photography.

## Overview

Optical Glass IR Silicon Si Wafer Windows is a glass wafer made from Silicon. Listed geometry: flat shape. Optical / electrical data: transmittance >95%. Coating: Silicon Windows. Typical applications: Lighting, Medical, Optical and Photography. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.

## Specifications

| Parameter | Value |
| --- | --- |
| Material | Silicon |
| Type | Optical Windows |
| Shape | Flat |
| Transmittance | >95% |
| Coating | Silicon Windows |
| Usage | Lighting, Medical, Optical, Photography |
| Lenses Color | Black |
| Supplier | Shenyang Ebetter Optics Co., Ltd. |

## Technical data

| Parameter | Value |
| --- | --- |
| Diameter | 0.2-300mm |
| Thickness | 0.1-100mm |
| Dimension tolerance | +/-0.1mm or +/-0.02mm |
| Surface quality (scratch & dig) | 60/40, 40/20 or better |
| Clear aperture | >85%, >90% |
| Surface accuracy | L/10 L/2 L |
| Parallelism | +/-3' ,+/-30'' |
| Bevel | 0.1~0.3mm x 45 degree |
| Coating | AR, BBAR or Custom |

## What to specify when you request a quote

- **Diameter and flat / notch** — state diameter, flat or notch and their tolerances.
- **Thickness and TTV** — give thickness, its tolerance and total thickness variation.
- **Polish and roughness** — specify single- or double-side polish and roughness.
- **Flatness, bow and warp** — quote flatness, bow and warp limits.
- **Material grade** — listed as “Silicon”; name the grade (JGS1/JGS2, Borofloat 33, alkali-free, sapphire orientation).

## Engineering guides for this part

For material grades and coating options, see [BOROFLOAT 33 & Alkali-Free Glass Wafers: Material Guide](https://machiningglass.com/materials/borofloat-33-alkali-free-glass-wafers-material-guide/). How parts like this are machined and finished is covered in [Precision Glass Hole Machining for MEMS and Wafer Parts](https://machiningglass.com/capabilities/precision-glass-hole-machining-for-mems-and-wafer-parts/). For an application example, read [Alkali-Free Glass Wafers for Appliance Display Substrates](https://machiningglass.com/applications/alkali-free-glass-wafers-for-appliance-display-substrates/). Before sending a drawing, check [Specifying Coatings for Custom Glass Windows and Substrates](https://machiningglass.com/resources/specifying-coatings-for-custom-glass-windows-and-substrates/). A related standard product is [Alkali-Free Glass Wafers](https://machiningglass.com/products/alkali-free-glass-wafers/).

## FAQ

### What is the Optical Glass IR Silicon Si Wafer Windows made of?

It is listed as Silicon. Coating: Silicon Windows. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.

### 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 glass wafer used?

Listed applications: Lighting, Medical, Optical and Photography.

### 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=7409#mg-rfq

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