# Optical 90 45 Degree Right Angle Prism with Coated Aluminum

> Optical 90 45 Degree Right Angle Prism with Coated Aluminum — an optical prism: Glass. Specs, RFQ checklist and custom sizes to drawing.

- Page: https://machiningglass.com/products/optical-90-45-degree-right-angle-prism-with-coated-aluminum/
- SKU: MG-25CE9A
- Category: Optical Lenses, Prisms & Mirrors > Optical Prisms
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Optical-90-45-Degree-Right-Angle-Prism-with-Coated-Aluminum.webp
- Updated: 2026-10-24

Product type: Equilateral Prism. Application: Digital Device. Model: STF51.

## Overview

Optical 90 45 Degree Right Angle Prism with Coated Aluminum: an optical prism made from Glass. Listed geometry: right angle shape. Surface quality 20-10; flatness 1/10 Lambda. Typical applications: Digital Device. 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 | Equilateral Prism |
| Shape | Right Angle |
| Surface Quality | 20-10 |
| Flatness | 1/10 Lambda |
| Application | Digital Device |
| Usage | Test |
| Model NO. | STF51 |
| Tolereance | +0.00/-0.002mm |
| Angle Tol | <0.2 Seonds |
| Supplier | Changchun Sunday Optics Co., Ltd. |

## Technical data

| Parameter | Value |
| --- | --- |
| Material | BK7, k9,UV Fused Silica,Sapphire, ZnSe,Caf2,Si,Ge,etc. |
| Size | 0.35mm-600mm |
| Size tolerance | +0.00/-0.05mm or customer request |
| Clear Aperture | >90% |
| S/D | 60-40 40-20 20/10 10/5 |
| Flatness | 1/10lambda at 632.80nm |
| Chamfer | 0.25mmx45° |
| Angle tolerance | <2'',<3'',<30'',<1',<3' |
| Coating | AR,HR,Aluminum,Silver or customer request. |

## What to specify when you request a quote

- **Material** — listed as “Glass”; name the glass or crystal.
- **Geometry** — listed as “<0.2 Seonds”; give diameter, focal length or radii, angles and tolerances.
- **Surface figure** — listed as “20-10”; quote surface figure (λ) and scratch-dig.
- **Centring and edges** — state centration and edge chamfer.
- **Coating** — list the band and reflectance or transmission target.

## Engineering guides for this part

How parts like this are machined and finished is covered in [Flat Glass Polishing Process for Precision Substrates](https://machiningglass.com/capabilities/flat-glass-polishing-process-for-precision-substrates/). Before sending a drawing, check [Design Guide for Holes, Slots, and Edges in Custom Glass Parts](https://machiningglass.com/resources/design-guide-for-holes-slots-and-edges-in-custom-glass-parts/).

## FAQ

### What is the Optical 90 45 Degree Right Angle Prism with Coated Aluminum made of?

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

### Where is this optical prism used?

Listed applications: Digital Device.

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

Include material, geometry, surface figure, centring and edges and coating, 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=17173#mg-rfq

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