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.
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UV BPF

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



▶ Features

High Transmittance

High Reflecttance

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 (%)

AR Coating
Glass
UV Pass Coating
.
.
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NIR BPF

The key to optical recognition products for mobile and automotive
▶ Applicable Products



▶ Features

Characteristics of Wavefront

High Quality

Mass Production Capa
01
Low shift by AOI at center wavelength
- 0~30deg
02
Detecting fine dust & defects by dedicated AVI system
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 (%)

AR Coating
Glass
BPF Coating
Structure
.
.
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Dual BPF

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



▶ Features

Dual Band
01
Support Dual Bands Filtering
- Visible & NIR bands

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 (%)

AR Coating
Glass
Dual Pass Coating
Structure