# 6mm H-K9l Bi-Concave Optical Lens 880-920nm Ar Coated

> 6mm H-K9l Bi-Concave Optical Lens 880-920nm Ar Coated — an optical lens: Bk7 / H-K9l Optical Glass, Ar Coating. Specs, RFQ checklist and custom sizes to…

- Page: https://machiningglass.com/products/6mm-h-k9l-bi-concave-optical-lens-880-920nm-ar-coated/
- SKU: MG-4B8A81
- Category: Optical Lenses, Prisms & Mirrors > Precision Optical Lenses
- Image: https://machiningglass.com/wp-content/uploads/2026/10/6mm-H-K9l-Bi-Concave-Optical-Lens-880-920nm-Ar-Coated.webp
- Updated: 2026-10-24

Product type: Biconvex Lens. Application: Lighting, Medical, Optical, Photography. Model: SA010.

## Overview

6mm H-K9l Bi-Concave Optical Lens 880-920nm Ar Coated: an optical lens made from Bk7 / H-K9l Optical Glass. Coating: Ar Coating; surface quality 60/40, 40/20, 20/10. Listed for Laser Machine Vision and Optical Equipment 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 | Bk7 / H-K9l Optical Glass |
| Type | Biconvex Lens |
| Shape | Customized |
| Coating | Ar Coating |
| Surface Quality | 60/40, 40/20, 20/10 |
| Application | Laser Machine Vision / Optical Equipment |
| Usage | Lighting, Medical, Optical, Photography |
| Model NO. | SA010 |
| Functions | Light convergence and divergence |
| Supplier | Suzhou Vangta Electronic Technology Co., Ltd. |

## Technical data

|   |   |   |   |
| --- | --- | --- | --- |
| Origin | Jiangsu, China | Customization | OEM / ODM Available |
| Brand | Vangta | Coating | Anti-Reflective Coating |
| Model No. | LENS-01 | Surface Quality | 60/40, 40/20, 20/10 |
| Product Type | Biconvex Lens | Application | Laser Machine Vision / Optical Equipment |
| Diameter | 1–360mm / Customized | Material | BK7 / H-K9L Optical Glass |

## What to specify when you request a quote

- **Material** — listed as “Bk7 / H-K9l Optical Glass”; name the glass or crystal.
- **Geometry** — give diameter, focal length or radii, angles and tolerances.
- **Surface figure** — listed as “60/40, 40/20, 20/10”; quote surface figure (λ) and scratch-dig.
- **Centring and edges** — state centration and edge chamfer.
- **Coating** — listed as “Ar Coating”; 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 [Flat Glass Polishing Process for Precision Substrates](https://machiningglass.com/capabilities/flat-glass-polishing-process-for-precision-substrates/). For an application example, read [AR Coated Glass for Appliance Touch Screens: Specs and Selection](https://machiningglass.com/applications/ar-coated-glass-for-appliance-touch-screens-specs-and-selection/). 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 [AR-Coated High-Transparency Optical Glass](https://machiningglass.com/products/ar-coated-high-transparency-optical-glass/).

## FAQ

### What is the 6mm H-K9l Bi-Concave Optical Lens 880-920nm Ar Coated made of?

It is listed as Bk7 / H-K9l Optical Glass. Coating: Ar Coating. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.

### Where is this optical lens used?

Listed applications: Laser Machine Vision and Optical Equipment.

### 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=16269#mg-rfq

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