OPT3101: OPT3101 achieves 5m ranging

Annie Liu

Part Number: OPT3101

Hi Team,

Currently customer's new project needs to use TOF to measure distance. The specific requirements are as follows:
1) The measuring distance is greater than 3m, that is, 30cm~3m, and 5m is better;
2) In combination with the selection of infrared emission, it is required that no visible light is emitted during data transmission, which is invisible to the naked eye;
3) The measurement accuracy requires ±10%;
4) Power consumption is not mandatory;
5) With the selection of infrared emission tube and photodiode, the FOV of 60 degrees can be realized;
6) Can handle indoor and outdoor glare environments.

Customer wants to know:
1) What is the recommended solution based on the above design requirements?
2) What is the actual measurement distance range under actual outdoor glare?
3) The parameters that need to be paid attention to when selecting the peripheral red light emitting tube and photodiode of OPT3101;
4) Is there a recommended document?

Thanks.

over 6 years ago

0 Alex Bhandari-Young over 6 years ago

TI__Mastermind 25905 points

Hi Annie,

1) Larger the FoV the shorter the range for a given optical power level. I would suggest splitting 60 degrees FoV into 3x 20 deg FoV for best range is 60 deg FoV is needed. However, getting to 5m may be tricky with 20 deg FoV. I would suggest checking OSRAM LEDs first and putting into our system estimator tool to see the performance. Please let me know if you need any help here.
2) OPT3101 has ambient rejection up to 130klux so this should not be an issue. We have a system estimator tool online for estimating performance with different optical components
3) See http://www.ti.com/lit/ug/sbau305a/sbau305a.pdf emitter selection section
4) We have a lot of collateral online including training videos, documents, and software tools. These are all on the OPT3101 page under the respective tabs. Below are my recommendations

system design guide: http://www.ti.com/lit/ug/sbau305a/sbau305a.pdf

system estimator tool: www.ti.com/.../sbau306

Training videos: https://training.ti.com/zero-hero-time-flight-training-series

For a full list see here: https://e2e.ti.com/support/sensors/f/1023/t/815766

Best,

Alex

0 user1479444 over 6 years ago in reply to Alex Bhandari-Young

Prodigy 10 points

Hi Alex,

Thanks for you reply.

1)As you said, the FOV 60 deg is splited into 3x20 deg.I am fraid it is a little hard because two of the structure.If we choose an IR with 40 deg,how about the distance?

2)If we choose an IR as emmitter what is max power limitation for standard?

Thanks.

0 Alex Bhandari-Young over 6 years ago in reply to user1479444

TI__Mastermind 25905 points

Hi,

The system estimator tool (link above) allows you to simulate this, but in general increasing FoV will decrease range. Max current from OPT3101 is in the datasheet (173mA). You would want to use this with the emitter datasheet plot to calculate max power. Each emitter efficiency will be different so this is the reason for needing to check emitter datasheet.

Best,

Alex

Sensors

Sensors forum

OPT3101: OPT3101 achieves 5m ranging