# High-Quality Bp945/20K Band Pass Optical Filter for Precision Applications

> High-Quality Bp945/20K Band Pass Optical Filter for Precision Applications — a bandpass filter: Glass, 1mm-2mm thick, 945. Specs, RFQ checklist and custom…

- Page: https://machiningglass.com/products/high-quality-bp945-20k-band-pass-optical-filter-for-precision-applications/
- SKU: MG-9F1A73
- Category: Optical Filters > Bandpass & Interference Filters
- Image: https://machiningglass.com/wp-content/uploads/2026/10/High-Quality-Bp945-20K-Band-Pass-Optical-Filter-for-Precision-Applications.webp
- Updated: 2026-10-24

Product type: Thin Film Filter. Application: Lighting, Medical, Optical, Machine Vision. Model: BP945/20K.

## Overview

High-Quality Bp945/20K Band Pass Optical Filter for Precision Applications: a bandpass filter made from Glass. Listed geometry: thickness 1mm-2mm. Optical / electrical data: wavelength 945. Typical applications: Lighting, Medical, Optical and Machine Vision. 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 | Thin Film Filter |
| Shape | Customized |
| Usage | Lighting, Medical, Optical, Machine Vision |
| Model NO. | BP945/20K |
| Thickness Range | 1mm-2mm |
| Color | White |
| Principle | Interference Filter |
| Angle of incidence | 0° |
| Center Wavelength(Nm) | 945 |
| Bandwidht:(Nm) | 20 |
| Tpeak(%) | >85 |
| Od | 3 |
| Over(Nm) | 200~1100 |
| Center Wavelength (CWL) | Precisely positioned with a customization accuracy of up to ±0.25nm to ensure perfect matching with the emission spectrum of light sources and detector sensitivities. |
| Peak Transmittance (Tpeak) | High-transmission dielectric coating with typical peak transmittance >90% (up to >95% for specific bands), maximizing the retention of the effective signal light. |
| Bandwidth (FWHM) | Available in a wide range of options, from ultra-narrow band (<3nm), narrow band (3-20nm) to broadband (>20nm), catering to different spectral resolution requirements. |
| Warranty Period | 2 Years |
| Technology | Free technical support and solutions provided |
| Supplier | Shanghai Mega-9 Optoelectronic Co., Ltd. |

## Technical data

|   |   |   |   |
| --- | --- | --- | --- |
| Parameter | BP1064/1K | BP532/1K | BP632/1K |
| Center Wavelength (nm) | 1064 ± 0.15 | 532 ± 0.15 | 632 ± 0.15 |
| Bandwidth (FWHM, nm) | 1.0 ± 0.2 | 1.0 ± 0.2 | 1.5 ± 0.2 |
| Peak Transmittance (%) | ≥70 | ≥ 75 | ≥ 80 |
| Blocking Depth (OD) | OD5 | OD6 | OD6 |
| Surface Quality (S/D) | 60-40 | 60-40 | 60-40 |
| Operating Temp. (°C) | -40 ~ +85 | -40 ~ +85 | -40 ~ +85 |
| Dimensions (mm) | 25.4 *1.0 | 25.4 *1.0 | 25.4 *1.0 |

## What to specify when you request a quote

- **Spectral target** — listed as “945”; state the centre or edge wavelength, the bandwidth and the minimum transmission in the passband.
- **Blocking** — listed as “3”; give the blocking range and optical density (OD) the system needs.
- **Angle of incidence** — listed as “0°”; interference filters shift with angle, so specify the operating angle and cone.
- **Size and thickness** — listed as “1mm-2mm”; give outline, thickness and tolerance, and whether the filter is mounted.
- **Substrate** — listed as “Glass”; name the substrate glass if thermal or UV behaviour matters.
- **Surface quality** — quote scratch-dig for imaging paths.

## Engineering guides for this part

For material grades and coating options, see [Selecting Bandpass Filter Glass for Reliable Optical Performance](https://machiningglass.com/materials/selecting-bandpass-filter-glass-for-reliable-optical-performance/). How parts like this are machined and finished is covered in [Custom Precision Glass Machining for Complex Components](https://machiningglass.com/capabilities/custom-precision-glass-machining-for-complex-components/). For an application example, read [Bandpass Filter Glass for Appliance Light Detection Modules](https://machiningglass.com/applications/bandpass-filter-glass-for-appliance-light-detection-modules/). Before sending a drawing, check [Choosing Glass Materials for Optical & Industrial Components](https://machiningglass.com/resources/choosing-glass-materials-for-optical-industrial-components/). A related standard product is [Bandpass Filter](https://machiningglass.com/products/bandpass-filter/).

## FAQ

### What is the High-Quality Bp945/20K Band Pass Optical Filter for Precision Applications 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 1mm-2mm. Custom outlines and thicknesses are made to drawing; state the tolerance you need.

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

Listed values: wavelength 945. Confirm the values at your operating wavelength, angle and temperature when you request a quote.

### Where is this bandpass filter used?

Listed applications: Lighting, Medical, Optical and Machine Vision.

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

Include spectral target, blocking, angle of incidence, size and thickness and substrate, 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=10591#mg-rfq

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