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3A-P-FS Sensor
Aug 2009
Ophir, PhotonicsRequest Info
Measuring Low Power, Energy, Divergent Beams
LOGAN, Utah, Aug. 19, 2009 – Ophir-Spiricon Inc. has announced the convection-cooled 3A-P-FS sensor that is designed to measure low-power and -energy light sources and divergent beams, such as LEDs and diode lasers. It features a wide 12-mm numerical aperture and a fused silica window in front of the detector. The window, only 7 mm from the sensor surface, keeps out air currents and long-wavelength background heat, allowing accurate measurement of low power. The sensor can measure divergent beams up to ± 40°. OphirSpiricon-3APFS.jpg

It measures very low power, pulsed or continuous-wave lasers in the 0.19 to 20 µm wavelength range. The company says that the sensor's p-type absorber provides a larger aperture and flatter spectral response than broadband devices, maximizing performance across the entire spectral range. Optical power can be measured from 60 µW to 3 W, and energy from 20 µJ to 2 J.

Maximum average power density is 50 W/cm2, power noise level is 6 µW, thermal drift is 20 to 40 µW, and power accuracy is ±3%. Response time is 2.5 s, and linearity with power is ±1.5%.

The sensor works with all of the company’s smart displays and PC interfaces. Each display features a "smart connector" interface that automatically configures and calibrates the display when plugged into one of the company's measurement heads.

For more information, visit:  

Ophir-Spiricon Inc.
60 West 1000 North
Logan, Utah 84321-2240
Phone: (435) 753-3729
Fax: (435) 753-5231


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The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
1. A generic term for detector. 2. A complete optical/mechanical/electronic system that contains some form of radiation detector.
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