Photonics/Optics

Optical Sensor

Maxim Integrated Products (Sunnyvale, CA) offers the MAX44000, a digital ambient-light and infrared proximity sensor that detects light like a human eye. Designed using the company’s proprietary BiCMOS technology, the IC integrates three optical sensors, two ADCs, and digital functionality into a 2mm x 2mm x 0.6mm package.

Posted in: Products, Products, Photonics

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3D Polarizing Filters

American Polarizers (Reading, PA) has introduced glass 3D circular polarizing filters for use with dual projection systems. API filters feature a range of sizes up to 14" x 20". Tight control of transmission characteristics gives the filters low ghosting properties when used with high-light-output projection systems of up to 30,000 lumens. Anti-reflective coatings on both sides enhance light transmission properties. Standard axis configuration is 0°/90°, but nonstandard axis configurations can be customized whether for circularly or elliptically polarized filters.

Posted in: Products, Products, Photonics

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Laser Diode

Renesas Electronics (Tokyo, Japan) and California Eastern Laboratories (Santa Clara, CA) are now sampling the 405-nm Blue-Violet Laser Diode, the NV4V31MF. The NV4V31MF provides precise laser emission supporting particle measurement, industrial precision measurement including location measurement and surface uniformity detection, holography, lithography, wafer processing equipment, and bio-medical instrumentation. The NV4V31MF provides designers with a Blue-Violet Laser Diode in a 3.8 mm CAN package. The NV4V31MF has an optical output power (CW) of 175mW @ 150mA, peak emission wavelength of 405 nm, and an operating temperature range of 5°C to 85°C.

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A Better Understanding of High-Temperature Superconductors

Superconductivity, in which electric current flows without resistance, promises huge energy savings – from low-voltage electric grids with no transmission losses, super-efficient motors and generators, and myriad other schemes. But such everyday applications still lie in the future, because conventional superconductivity in metals can’t do the job.

Posted in: News, News, Power Management, Energy, Energy Storage, Lasers & Laser Systems

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Compact Green Disk Laser for Therapy Systems

This diode-pumped, thin-disk laser is designed for applications in ophthamology, dematology, and endoscopy The JenLas® D2.mini 5/8 W, recently introduced to the U.S. market, offers an output power of up to 8 Watts. Lasers of the JenLas D2 product line work in continuous wave mode, emitting green laser light at 532 nm. The infrared laser light is converted into green laser light by an intracavity frequency doubling crystal. The new laser is a multi-mode system.

Posted in: Briefs, MDB, Briefs, Medical, Surgical Robotics/Instruments, Lasers & Laser Systems

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Light Source Enables Endoscope Miniaturization

This work will explore an illumination system's potential to miniaturize traditional endoscopes by shrinking the size of the channel used to deliver light. Physical space constraints continue to impact advanced procedures such as single-incision laparoscopic surgery, robotic-assisted surgery, and other minimally invasive surgical procedures. Additional functionality and instruments are being squeezed through the smallest incisions possible. Available space continues to tighten with the migration of larger diameter, three-dimensional, high-definition endoscopic imaging systems into minimally invasive procedures. Fortunately, a significant portion of the endoscope, the light delivery channel, can be reduced in size, thereby allowing the space to be used for other purposes, or for shrinking the endoscope itself.1

Posted in: Briefs, MDB, Briefs, Imaging, Bio-Medical, Diagnostics, Medical, Fiber Optics

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Fiber Optic Oxygen Sensors — How Do They Work?

Fiber optic oxygen sensors use the fluorescence of a chemical complex in a sol-gel to measure the partial pressure of oxygen. The pulsed blue LED sends light, at ~475 nm, to an optical fiber. The optical fiber carries the light to the probe. The distal end of the probe tip consists of a thin layer of a hydrophobic sol-gel material.

Posted in: Articles, Features, ptb catchall, Photonics

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