Toshiba’s New Palm-sized Projector Unit Pushes LiDAR’s Detection Range to 300m, the World’s Longest, with Industry-leading Image Quality

News Source: 

-Flexibility to combine multiple projectors allows customization of detection range and angle, realizes wide application from autonomous driving to infrastructure monitoring.-

TOKYO—Toshiba Corporation (TOKYO: 6502) has revealed major advances in shrinking the laser projector unit of its LiDAR to one quarter the size of the previous version released in June 2021. Using two of the new projector units, the new LiDAR is just 206cmin volume that can fit comfortably into the palm of the hand. Its range has been pushed out to 300m, the world’s longest(*1) with an industry-leading image resolution of 1200x84 pixels. It can be configured with flexible combinations of projector units to handle a variety of long-range and wide-angle detection applications. 
 
The new LiDAR will advance progress in Toshiba’s focus application areas, autonomous driving and infrastructure monitoring, and also opens the way to exploring partnerships in other areas, including robotics, drones and small security devices.
 
Figure 1: Toshiba’s LiDAR with two newly developed projectors.
Figure 1: Toshiba’s LiDAR with two newly developed projectors.
 
Toshiba initiated LiDAR research to advance autonomous driving and infrastructure resiliency. In addition to extending the range, with a wider viewing angle and better resolution, it had to make the LiDAR even smaller. However, there has long been a trade-off in LiDAR range and size against the requirement of an eye-safe laser. Akihide Sai, the Senior Research Scientist at Toshiba’s Corporate Research & Development Center behind the new LiDAR, explains the challenge: “To extend the range of a laser emitted by a single projector, you have to increase its intensity. If you do that, you also have to increase its emission width, to avoid a beam that focuses on a small spot and is strong enough to impair eyesight. The problem is, a wider emission requires a larger projector.”
 
Toshiba’s solution is a LiDAR that can use multiple small projector units, the laser beam source. They all emit an eye-safe beam in the same direction, which increases the effective range. This approach also keeps down the LiDAR’s overall size.
 
The advances that realized the new LiDAR started with shrinking the volume of the projector unit to 71cm3. This was achieved with an innovative circuit design that reduced the motor control board by 60% against the size of the previous prototype, and using know-how in 3D component mounting to reposition components and lenses. 
 
Figure 2: Overview of Toshiba’s solution to overcome the trade-off in LiDAR size and range against the requirement of an eye-safe laser.
Figure 2: Overview of Toshiba’s solution to overcome the trade-off in LiDAR size and range against the requirement of an eye-safe laser.
 
Figure 3: Shrinking projector size with a smaller motor control board, and by using 3D mounting technology to position components and lenses.
Figure 3: Shrinking projector size with a smaller motor control board, and by using 3D mounting technology to position components and lenses.
 
The development team also drew on Toshiba’s proprietary motor control technology to come up with a triple control loop for the rotation speed, rotation angle and current of the polygonal mirrors in multiple projectors. This secures high accuracy synchronization, and the deviation angle of the mirrors is only 0.02 degrees or less. 
 
In field tests, Toshiba confirmed that a LiDAR with two of the new projectors has a range of 300m, 1.5 times further than its previous prototype with a single projector. In very bright sunlight conditions, 100,000 lux, the two-projector LiDAR also showed much more detail in the scanned image than its predecessor.
 
Figure 4: A LiDAR with two of the new projectors has reached a range of 300m.
Figure 4: A LiDAR with two of the new projectors has reached a range of 300m.
 
Figure 5: Higher image quality confirmed using LiDAR with two projectors (right) than one (left).
Figure 5: Higher image quality confirmed using LiDAR with two projectors (right) than one (left).
 
The flexibility gained by combining multiple projectors, and fine-tuning control of the emitted laser, opens the way to customizing the LiDAR for long-range and wide-angle scanning. This will extend use to areas such as automatic guided vehicles, which must combine wide-angle views with long-range route monitoring.
 
Figure 6: LiDAR of various performances can be realized by combining the developed projectors.
Figure 6: LiDAR of various performances can be realized by combining the developed projectors.
 
Sai and his colleagues are building on current achievements for future advances: “We are continuing research work that will advance our LiDAR technology, including solid-state LiDAR, toward boosting range and resolution, and making the LiDAR even smaller. We aim to commercialize LiDAR for autonomous driving and infrastructure monitoring in fiscal year 2023, and look forward to exploring new applications in robots, drones, and security devices.”
 
 
 

2022 Infrared Sensing Application Market and Branding Strategies
Release: 01 January 2022
Format: PDF
Language: Traditional Chinese / English
Page: 164

If you would like to know more details , please contact:

Global Contact:
 
ShenZhen:
Grace Li
E-mail :  Graceli@trendforce.com
Tel : +886-2-8978-6488 ext.916
  Perry Wang
E-mail :  Perrywang@trendforce.cn
Tel : +86-755-82838931 ext.6800
 
Disclaimers of Warranties
1. The website does not warrant the following:
1.1 The services from the website meets your requirement;
1.2 The accuracy, completeness, or timeliness of the service;
1.3 The accuracy, reliability of conclusions drawn from using the service;
1.4 The accuracy, completeness, or timeliness, or security of any information that you download from the website
2. The services provided by the website is intended for your reference only. The website shall be not be responsible for investment decisions, damages, or other losses resulting from use of the website or the information contained therein<
Proprietary Rights
You may not reproduce, modify, create derivative works from, display, perform, publish, distribute, disseminate, broadcast or circulate to any third party, any materials contained on the services without the express prior written consent of the website or its legal owner.

Tokushima, Japan – 17 June 2022: Nichia, the world’s largest LED manufacturer and inventor of high-brightness blue and white LEDs, announces the addition of the Direct Mountable Chip Series (Part Number: NVSWE21A-V1) to the portfol... READ MORE

DURHAM, N.C.--(BUSINESS WIRE)--Cree LED, an SGH company (Nasdaq: SGH), announced today the launch of XLamp® Element G LEDs, delivering a new product class with unmatched light output and efficiency for LEDs of this size. The... READ MORE