Bar Code Scanner Photodiode Sensor

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Overview

The BC20 bar code scanner photodiode sensor is designed to measure scanned or intermittent beams. It has a swivel mount and a 10x10 mm aperture. It covers the spectral range 400-1100 nm and its power measuring range is 0.1-20 mW.

Measure scanned beams such as bar code sources
400-1100 nm range
10 x 10 mm aperture

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Products

		Compare	Model	Compatibility	sortOrder	rankScore	ranking	Drawings, CAD & Specs		Aperture Size	Spectral Range	Maximum Average Power	Availability	Featured Item	Price		Brand
		7Z02481 BC20 Bar Code Scanner Power Sensor, Silicon, 0.1-20 mW, 10x10 mm, 400-1100 nm $938 Contact Us	7Z02481 BC20 Bar Code Scanner Power Sensor, Silicon, 0.1-20 mW, 10x10 mm, 400-1100 nm	UNIVERSAL	0.0	1.0	0.0		0.0	10 x 10 mm	400-1100 nm	20 mW	Contact Us		$938		Ophir

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Specifications

Aperture Size

10 x 10 mm
Material

Silicon
Spectral Range

400-1100 nm
Power Range

0.1 mW to 20 mW
Maximum Average Power Density

50 W/cm²

Dimensions

118 x 10 x 18 mm (LxWxD)
Use

1.5 m
CE Compliance

Yes
UKCA Compliance

Yes
China RoHS Compliance

Yes

Features

Measuring Power of Scanned Beams Using BC20

In this video, you will learn how the BC20 sensor enables correct power measurement of scanned beams, such as are used in barcode readers, laser shows and similarly challenging applications.

Measuring Very Low Laser Powers with a Photodiode Sensor

In this short “Basics” video, we review in general the use of photodiode sensors for measuring very low laser powers.

Frequently Asked Questions

Do I need to recalibrate my instrument? How often must it be recalibrated?
Answer
Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

How does the BC20 measure the true power of a scanned beam?
Answer
The BC20 has a peak measurement and hold circuit which measures the peak power on the detector and holds it. Therefore when a beam is scanned over the detector, when the beam is on the detector it goes up to a peak which corresponds to the same power the detector would measure if the beam was stationary and therefore the BC20 reads the correct power whether the beam is scanned or not. In order for the BC20 to do this, the beam must be on the detector (of size 10x10mm) for at least ~13µs and therefore this limits the scanning speed on the detector to 30,000 inch/s.

What does the PD300 "Background Subtraction" do?
Answer
Ophir's Photodiode PD300 and PD300-1W sensors offer automatic background subtraction so the measurement is not sensitive to room light. With "filter out" (i.e. the external filter removed for low light measurements), 2 separate detector elements are visible. The beam to be measured is incident only on the outer of the 2 detectors, but background light reaches both detectors. The instrument will show the power measured by the outer detector minus that measured by the inner detector.This patented method cancels out 95% - 98% of background light under normal room conditions, even if it is constantly changing.

Why won’t a BC20 sensor work with the StarLite display?
Answer
The BC20 sensor was not intended to be used with the StarLite display. If you use the Nova II or Vega display it will work.

Frequently Asked Questions

Do I need to recalibrate my instrument? How often must it be recalibrated?
Answer
Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

How does the BC20 measure the true power of a scanned beam?
Answer
The BC20 has a peak measurement and hold circuit which measures the peak power on the detector and holds it. Therefore when a beam is scanned over the detector, when the beam is on the detector it goes up to a peak which corresponds to the same power the detector would measure if the beam was stationary and therefore the BC20 reads the correct power whether the beam is scanned or not. In order for the BC20 to do this, the beam must be on the detector (of size 10x10mm) for at least ~13µs and therefore this limits the scanning speed on the detector to 30,000 inch/s.

What does the PD300 "Background Subtraction" do?
Answer
Ophir's Photodiode PD300 and PD300-1W sensors offer automatic background subtraction so the measurement is not sensitive to room light. With "filter out" (i.e. the external filter removed for low light measurements), 2 separate detector elements are visible. The beam to be measured is incident only on the outer of the 2 detectors, but background light reaches both detectors. The instrument will show the power measured by the outer detector minus that measured by the inner detector.This patented method cancels out 95% - 98% of background light under normal room conditions, even if it is constantly changing.

Why won’t a BC20 sensor work with the StarLite display?
Answer
The BC20 sensor was not intended to be used with the StarLite display. If you use the Nova II or Vega display it will work.