3D Sensing Filters

PRODUCT CATEGORIES

INOUIRY

3D Sensing Filter, also known as 3D camera narrowband infrared filter or biometric filter; Mainly equipped with structured light, iToF indirect flight time, dToF single point/area array ranging, VCSEL near-infrared active lighting system.

Three major 3D sensing solutions

Structured Light (FaceID, Front Face Recognition)

Standard wavelength: 940 nm

IToF indirect flight time (mobile phone rear ToF, AR, sweeping machine, industrial 3D camera)

940 nm (mainstream consumer electronics)/850 nm (early solutions, industrial vision)

DToF direct flight time (single point ranging, SPAD array, short-range Flash radar)

Wavelength: mostly 940nm; 905nm is selected for long-distance dToF section

Core categories of 3D Sensing Filters

1. Narrowband bandpass filter

Typical incident angle: 0 ° to ± 20 °, ± 25 ° (much larger than the conventional ± 8 ° for vehicle mounted LiDAR)

Reference for bandwidth selection:

Structured light facial recognition: FWHM 30-50 nm

IToF mobile phone/sweeping robot: FWHM 20-40 nm

Outdoor strong light dToF array: FWHM 10-20 nm

Cut off specification: 400-780nm visible light OD ≥ 4 (T ≤ 0.01%)

2. IR-CUT infrared cut-off filter (color RGB auxiliary camera)

Paired with a color camera inside the 3D module, it filters out infrared interference to ensure normal color.

3. Dicroic (transceiver module)

Reflecting VCSEL illumination beam; Transmitting and reflecting signals to image sensors, commonly used in miniaturized modules.

Inventory Parameters with 450nm Dichroic Short Pass Filter

The above models are available in stock for you to choose from, if you need custom Optical Dichroic Filters or bulk orders, please contact our sales team: info@borisuns.com