# Optical Bk7 Glass Penta Prism

> Optical Bk7 Glass Penta Prism — an optical prism: Optical Glass, Customized thick, UV. Specs, RFQ checklist and custom sizes to drawing.

- Page: https://machiningglass.com/products/optical-bk7-glass-penta-prism/
- SKU: MG-E5BA8F
- Category: Optical Lenses, Prisms & Mirrors > Optical Prisms
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Optical-Bk7-Glass-Penta-Prism.webp
- Updated: 2026-10-24

Product type: Convex Lens. Application: Optical. Model: FW-PRISM.

## Overview

The Optical Bk7 Glass Penta Prism is supplied as an optical prism made from Optical Glass. Listed geometry: size Customized, thickness Customized, single-lens shape. Optical / electrical data: transmittance >95%. Coating: UV. Typical applications: Optical. 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 |
| Type | Convex Lens |
| Shape | Single-lens |
| Size | Customized |
| Thickness | Customized |
| Transmittance | >95% |
| Coating | UV |
| Usage | Optical |
| Model NO. | FW-PRISM |
| Lenses Color | Clear |
| Growth Method | Ky |
| Supplier | Jiaozuo Commercial Finewin Co., Ltd. |

## Technical data

| Parameter | Value |
| --- | --- |
| Material | Optical glass such as BK7,B270,SF11,Fused silica,sapphire,znse,caf2. |
| Size | 2mm to 300mm |
| Size tol. | 0.05mm |
| S/D | 80/50,60/40,40/20,20/10,10/5 |
| Flatness | Lambda/20 to 2lambda |
| Angle tol. | 30'' |
| Chamfer | 0.2mmx45 degree |
| Coating | AL,Sliver,Golden. |

## What to specify when you request a quote

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

## Engineering guides for this part

For material grades and coating options, see [Fused Silica Windows for UV and Laser Optical Systems](https://machiningglass.com/materials/fused-silica-windows-for-uv-and-laser-optical-systems/). 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 Bk7 Glass Penta Prism made of?

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

### What sizes and thicknesses are available?

The listing gives size Customized, 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: transmittance >95%. Confirm the values at your operating wavelength, angle and temperature when you request a quote.

### Where is this optical prism used?

Listed applications: Optical.

### 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=17291#mg-rfq

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