# Optical Glass Bk7 Lens Customized Small Reticle

> Optical Glass Bk7 Lens Customized Small Reticle — an optical lens: Optical Glass, 40/20. Specs, RFQ checklist and custom sizes to drawing.

- Page: https://machiningglass.com/products/optical-glass-bk7-lens-customized-small-reticle/
- SKU: MG-1C68BF
- Category: Optical Lenses, Prisms & Mirrors > Precision Optical Lenses
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Optical-Glass-Bk7-Lens-Customized-Small-Reticle.webp
- Updated: 2026-10-24

Product type: Flat Lens. Model: reticle.

## Overview

Optical Glass Bk7 Lens Customized Small Reticle is an optical lens made from Optical Glass. Listed geometry: single-lens shape. Optical / electrical data: transmittance >95%. Coating: 40/20. 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 | Flat Lens |
| Shape | Single-lens |
| Transmittance | >95% |
| Coating | 40/20 |
| Model NO. | reticle |
| Lenses Color | Clear |
| Supplier | China Star Optics Technology Co., Ltd. |

## What to specify when you request a quote

- **Material** — listed as “Optical Glass”; name the glass or crystal.
- **Geometry** — 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 “40/20”; list the band and reflectance or transmission target.

## Engineering guides for this part

For material grades and coating options, see [Fused Silica and Other Glass Materials for Machined Components](https://machiningglass.com/materials/fused-silica-and-other-glass-materials-for-machined-components/). How parts like this are machined and finished is covered in [Optical Glass Polishing for High Clarity Surfaces](https://machiningglass.com/capabilities/optical-glass-polishing-for-high-clarity-surfaces/). For an application example, read [Boost Yield with Fused Silica Viewports for Vacuum and Optical Systems](https://machiningglass.com/applications/boost-yield-with-fused-silica-viewports-for-vacuum-and-optical-systems/). Before sending a drawing, check [Fused Silica Refractive Index: Key to Optical Design Improvement](https://machiningglass.com/resources/fused-silica-refractive-index-key-to-optical-design-improvement/). A related standard product is [Fused Silica Glass Wafers (2–12", JGS1/JGS2)](https://machiningglass.com/products/fused-silica-glass-wafers-2-12-jgs1-jgs2/).

## FAQ

### What is the Optical Glass Bk7 Lens Customized Small Reticle made of?

It is listed as Optical Glass. Coating: 40/20. 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.

### 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=14989#mg-rfq

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