Brookman's CMOS-ToF Technology



Brookman Technology has been getting involved in many types of Time of Flight(ToF) CMOS-ToF image sensors since year 2006 suitable for several needs such as scientific experiments, intelligent transportation systems, indoor surveillance, wearable devices. We provide innovative and stable solutions with expertise as a design partner.

Target Domain of Our Technology


A CMOS-ToF Pixel Structure


Part of New CMOS Lock-in Pixel for ToF sensor:
US Patent 9,202,902

CMOS-ToF Chips


Part of CMOS-ToF sensor
for customors, co-partners, and own products.

Evaluation Camera Development


Example: BEM80T(BT008D CMOS-ToF sensor)

Technical Papers

"A Time-of-Flight Range Image Sensor with Background Cancelling Lock-in Pixels Based on Lateral Electric Field Charge Modulation"
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY, Vol.3, No.3, May 2015

"A Submillimeter Range Resolution Time-of-Flight Range Imager With Column-Wise Skew Calibration"
IEEE TRANSACTIONS ON ELECTRON DEVICES, Vol. 63, No. 1, Jan 2016

"A 10 ps Time-Resolution CMOS Image Sensor With Two-Tap True-CDS Lock-In Pixels for Fluorescence Lifetime Imaging"
IEEE JOURNAL OF SOLID-STATE CIRCUITS, Vol. 51, No. 1, Jan 2016

"Indirect time-of-flight measurement technique with impulse photocurrent response for sub-millimeter range resolved imaging"
OPTICS EXPRESS 18904, Vol. 22, No. 16, Aug 2014

"Single-event transient imaging with an ultra-high-speed temporally compressive multi-aperture CMOS image sensor"
OPTICS EXPRESS 4155, Vol. 24, No. 4, Feb 2016



Key technology



Indirect ToF sensing with Short pulse modulation

Comparison of Continous Wave modulation and Short Pulse modulation




    Merit of Short Pulse Modulation method
  • Decrease Light Source Power Consumption
  • Increase Ambient Light Tolerance
  • Digitally Controlled Light Modulation (Flexibility for light pulse number, width, switching, etc.)


Optimized CMOS-ToF Sensor and Operation

Dynamic Ambient Light Suppression (DALS) with 3-tap pixel CMOS-ToF sensor



ToF measurement with SPM method per frame
(Signal Integration)



Results of In-frame ambient light cancellation by DALS technology




Comparison of Ambient light cancelling Video


In-frame Cancelling by DALS
(BT-ToF cancelling method: SP type)

Cancelling with Consecutive frames
(Conventional cancelling method: CW type)


    Merit of 3-tap structure pixel and optimized operation method
  • High Ambient Light Tolerance (by DALS technology)
  • Minimize Motion Defects (DALS operation works every in-frame)
  • Wide Measurement Range (with in-frame range shift technique)


Playing Ukulele (finger action)
w/o any smoothing filters

Captured by BT008D (QVGA), CMOS-ToF image sensor



Mar. 28. 2019. ::: Revision. 1.0.1

Demo video

BT-ToF Evaluation Camera kit

Brookman Technology's CMOS-ToF Depth Senser Product Catalog

BEC80T04B BLUE (850nm)

Standard camera type

  • Dimension: 116mm x 107mm x 70mm (body)
  • Sensor: BT008D (QVGA)
  • Image resolution: 320 x 240 pixels
  • Measurement range: 0.5m to 4m, 4m to 8m
  • Frame rate: 10, 30 and 60fps
  • Illumination : 2x VCSEL (850nm)
  • Depth noise ~1% @ 4m
  • Interface: USB3.0 (Micro-B)
  • Remark: Laser class 1 product
  • Shipping: Worldwide
  Product Brochure

Quotation & Order request

BEC80T04B RED (940nm)

Standard camera type

  • Dimension: 116mm x 107mm x 70mm (body)
  • Sensor: BT008D (QVGA)
  • Image resolution: 320 x 240 pixels
  • Measurement range: 0.5m to 10m
  • Frame rate: 10, 30 and 60fps
  • Illumination : 6x VCSEL (940nm)
  • Depth noise ~1% @ 8m
  • Interface: USB3.0 (Micro-B)
  • Remark: Laser class 1 product
  • Shipping: Worldwide
  Product Brochure

Quotation & Order request

BEM80T04B

Mini module type

  • Dimension: 20mm x 70mm x 10mm
  • Sensor: BT008D (QVGA)
  • Image resolution: 240 x 240 pixels
  • Measurement range: 0.2m to 2m
  • Frame rate: 10, 30 and 60fps
  • Illumination : 1x VCSEL (850nm/940nm)
  • Depth noise ~2% @ 2m (T.B.D.)
  • Interface: USB3.0 (Micro-B)
  • Remark: Laser class 1 product
  • Shipping: Worldwide
  Product Brochure

Quotation & Order request

These evaluation camera kits have been classified as "Engineering Sample (ES)" product.

BT008D CMOS-ToF image sensor specification

For depth camera module developers

BT008D is a CMOS-ToF depth image sensor designed for 3D depth sensing based on indirect Time of Flight (iToF) method with short pulse modulation (SPM). Brookman’s innovative multi-tap gating pixel structure and an optimized pixel operation for iToF with SPM achieve high speed and high SNR depth sensing without dynamic motion defects. A QVGA resolution, approximately 80,000 effective pixel points, can be reasonable and well-matched for fast post-processing. In addition, this sensor is equipped with on-chip 12-bit high speed analog to digital converter so that it gets a fast readout time with low temporal noise. MIPI CIS-2 and CCI are adopted to the sensor interface.

BT008D


Specification table

Depth sensing method Indirect ToF with Short pulse modulation
Optical format 1/2.8 Type
Die size 7.6mm x 6.5mm
Pixel size 16.8µm x16.8µm
Number of pixels 328(H) x 247(V)
ADC resolution 12-bit on-chip
Frame rate Up to 60fps
Acquisition time 27.7msec@30fps
Readout time 5.6msec(typ.)
Sensor interface MIPI CSI-2(subset); 2data and 1clock lanes
Input clock frequency 27.8MHz(typ.)
Output data rate 378Mbps
Power supply 3.3V
Power consumption ≤150mW @30fps
Sensor I/O pins 47pins
Chip image
  • These typical values might be changed in mass-production.

ToF measurement with SPM method per frame
(Signal Integration)




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Brookman Technology, founded in Hamamatsu (Japan) in 2006, is a supplier of CMOS image sensor products and working on custom sensor design services covering a wide range of markets, such as industrial, scientific, security, professional and consumer products. Our technical domains backed with considerable experience and expertise in 3D depth, High-speed, High-sensitivity and 8K UHD imaging. Brookman's state-of-the-art pixel designs and circuit architectures are implimented in our products.

Company Location

125 Daikumachi, Naka-ku, Hamamatsu, 430-0936, Japan