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BPF (Band Pass Filter)

BPF is a highly utilized filter for 3D sensing (ToF: time of flight) and biometrics.
Optrontec's BPF offers a variety options to choose the suitable filter type for the application.
The BPF passes required wavelength bands and blocks the other bands.
These types of the width of the BPF represent wavelength ranges and vary up to hundreds ㎚s, and are classified with three important characteristics: Center Wavelength (CWL) value of the passband, FWHM (Full Width Half Maximum) and maximum transmittance value.

UV BPF

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UV BPF

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Band Pass Filter - Pass the UV band and IR band, and blocks visible and NIR(near-infrared) band

▶ Applicable Products

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▶ Features

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High Transmittance

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High Reflecttance

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Visible FOV

01

High Transmittance on

UV band

02

Block on Visible Ray

- OD > 3

03

UV wavelength band

- 300~400nm Pass available

▶ Product Characteristics

Structure

Item

Specification

> 0.21mm

360nm

Thickness

CWL

Characteristics

Pass Area (%)

Tavg ≥ 85% @ 330-380nm

Tmax ≤ 0.1% @ 400~110nm (OD>3)

Stop Area (%)

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AR Coating

Glass

UV Pass Coating

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NIR BPF

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NIR BPF

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The key to optical recognition products for mobile and automotive

▶ Applicable Products

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▶ Features

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Characteristics of Wavefront

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High Quality

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Mass Production Capa

01

Low shift by AOI at center wavelength

- 0~30deg

02

Detecting fine dust & defects by dedicated AVI system

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03

the World largest optical film filter manufacturing capacity

- 4 million pieces/month

▶ Product Characteristics

Item

Specification

> 0.21mm

850nm, 905nm, 940nm, etc

Thickness

CWL

Characteristics

Pass Range (%)

Tavg ≥ 95% @ 928~950nm

Tmax ≤ 0.01% @ 400~700nm (OD>5)

Tmax ≤ 0.01% @ 1,005~1,100 nm (OD>4 )

Stop Range (%)

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AR Coating

Glass

BPF Coating

Structure

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Dual BPF

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Dual BPF

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Dual Band Pass Filter (Dual BPF) is a filter product for implementing day/night images by selectively passing visible and near-infrared bands

▶ Applicable Products

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▶ Features

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Dual Band

01

Support Dual Bands Filtering

- Visible & NIR bands

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NIR Pass

02

Customizable NIR Pass Band Filtering 

- 850nm, 910nm, 940nm

▶ Product Characteristics

Item

Specification

> 0.21mm

Visible 650nm, NIR CWL 850nm or 940nm

Thickness

Cut-Off

Characteristics

Pass Area (%)

Tavg ≥ 90% @ 400~600nm & 850nm or 940nm

Tmax ≤ 0.1% @ 400~110nm (OD>3)

Stop Area (%)

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AR Coating

Glass

Dual Pass Coating

Structure

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