Random Dot Pattern Projectors for 3D Sensing

Pattern projectors are a critical component in 3D sensing applications. Light-coding and active-stereo systems such as the Realsense D400 (TM) product family, utilize compact dot pattern projectors to provide a high-resolution 3D image.

Infrared and visible-wavelength pattern projectors

To avoid discomforting the user and for eye-safety reasons, commonly infrared wavelengths are used, typically 850nm and 940nm. The infrared dot projector should match the FOV of the cameras, and the number of dots is optimized to the cameras’ resolution. IR pattern projectors are required to be small and lowcost. Some robotics applications operate at higher range, such as 3-8 meters, which requires higher optical power.

Engage Photonics IR dot projectors feature exceptional uniformity, dot density and contrast. Patterns up to 93 deg. full-angle are available.

Micro3D for medical applications

Ultrashort-range SMT pattern projector with customer-defined pattern.

Wavelengths650, 680, 850, 940 nmV
Dimensions3.5 x 3.5 x 4.2 mm 
Optical power1-3 mWV
Typ. range15-50 mmV

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SMT pattern projector are based on VCSEL array light source, offering high optical power along with small size and footprint.

Available Wavelengths940 nm
Dimensions: 3.5×3.5×4.2 mm
Pattern: tiled random
Optical power1200-1400 mW
Typ. range: 10-600 cm

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Mid-range pattern projectors feature few hundred mW to 2W optical peak power, at 850nm and 940nm wavelengths. Pattern is configurable. Integrated eye-safety electronics, thermistor and laser power monitor signal.

650, 680, 830, 850, 940 nmV
Dimensions: 20 x 14 x 9 mmHi-vol
Pattern: True randomV
Optical power10 – 5,000 mWV
Typ. range: 10 cm – 10 m (4″ to 30ft)V

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Lowcost pattern projectors down to 7mm external diameter.

650, 680, 830, 850, 940 nmV
Dimensions: D7x12mm or D12x12mmV
Pattern: tiled randomV
Optical power10 – 500 mWV
Typ. range: 10 – 400 cmV

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Lensless pattern projectors utilize advanced Diffractive Optical Elements (DOE) which eliminate the need in a collimating lens. While offering reduced contrast relative to their collimated-beam counterparts, these projectors are free from the undesired zero-order beam and reduce module cost.

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Custom dot pattern projector

Engage Photonics offer development and mass production of pattern projectors at any wavelength from 400nm to infrared. Be sure to send us your specifications.

Find an optimal solution for your 3D sensing system

We have 8 years of experience in 3D sensing system design and characterization. If you are not sure about your pattern projector requirements, send us your 3D sensor camera data and we would be glad to offer an optimal existing or custom solution for your application.