# Custom Heat Resistant Optical Observation Window Round Glass 0.5-200mm IR Optical Sapphire Window

> Custom Heat Resistant Optical Observation Window Round Glass 0.5-200mm IR Optical Sapphire Window — a sight / viewing glass: Glass, Customized thick…

- Page: https://machiningglass.com/products/custom-heat-resistant-optical-observation-window-round-glass-0-5-200mm-ir-optical-sapphire-window/
- SKU: MG-74D9A9
- Category: Industrial, Architectural & Appliance Glass > Sight Glass & Industrial Viewing Windows
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Custom-Heat-Resistant-Optical-Observation-Window-Round-Glass-0-5-200mm-IR-Optical-Sapphire-Window.webp
- Updated: 2026-10-24

Product type: Optical Glass Window. Application: Lighting, Medical, Optical, Photography.

## Overview

The Custom Heat Resistant Optical Observation Window Round Glass 0.5-200mm IR Optical Sapphire Window is supplied as a sight / viewing glass made from Glass. Listed geometry: thickness Customized. Optical / electrical data: wavelength 355-1064nm. Listed for Lighting, Medical, Optical and Photography 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 | Glass |
| Type | Optical Glass Window |
| Shape | Customized |
| Cwl | 355-1064nm |
| Usage | Lighting, Medical, Optical, Photography |
| Thickness Range | Customized |
| Color | Transparent |
| Principle | Cut-off Filter |
| Angle of incidence | 45° |
| Name | Optical Window |
| Key | Optical Glass Window |
| Thickness Tolerance | ±0.1mm |
| Use | Optical and Photographic Instrument |
| Supplier | Shanghai Jingsheng Optoelectronics Technology Co., Ltd |

## Technical data

| Parameter | Value |
| --- | --- |
| Name | Optical windows |
| Material | optical glass, UVF, Sapphire etc. |
| Diameter | 0.2-300mm |
| Thickness | 0.5-5mm |
| Dimension tolerance | +/-0.1mm or +/-0.02mm |
| Surface quality | 40/20 ~ 80/50 or Better |
| Clear aperture | >85%, >90% |
| Surface accuracy | λ/10 λ/2 |
| Bevel | 0.1~0.3mm x 45 degree |
| Coating | AR or Custom |

## What to specify when you request a quote

- **Glass type and thickness** — listed as “Glass”; name the glass and thickness.
- **Temperature and pressure** — give working temperature, thermal shock and any pressure rating.
- **Strengthening and safety** — state tempering, lamination or the safety standard.
- **Outline and edges** — listed as “Customized”; send a drawing with outline, holes and edge finish.

## Engineering guides for this part

For material grades and coating options, see [Infrared Window Glass: Material Options for Optical Sensors & Parts](https://machiningglass.com/materials/infrared-window-glass-material-options-for-optical-sensors-parts/). How parts like this are machined and finished is covered in [Chalcogenide Glass Coating for IR Optical Components](https://machiningglass.com/capabilities/chalcogenide-glass-coating-for-ir-optical-components/). For an application example, read [Infrared Window Glass for Smart Home Appliance Sensors](https://machiningglass.com/applications/infrared-window-glass-for-smart-home-appliance-sensors/). 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 [Infrared Windows](https://machiningglass.com/products/infrared-windows/).

## FAQ

### What is the Custom Heat Resistant Optical Observation Window Round Glass 0.5-200mm IR Optical Sapphire Window made of?

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

### What sizes and thicknesses are available?

The listing gives thickness Customized. Custom outlines and thicknesses are made to drawing; state the tolerance you need.

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

Listed values: wavelength 355-1064nm. Confirm the values at your operating wavelength, angle and temperature when you request a quote.

### Where is this sight / viewing glass used?

Listed applications: Lighting, Medical, Optical and Photography.

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

Include glass type and thickness, temperature and pressure, strengthening and safety and outline and edges, 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=4871#mg-rfq

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