Photonics/Optics

Using Vacuum Technology to Cool CCDs

Imagine a CCD camera operating on a long exposure and seeing only 1 electron per pixel every 16 minutes. That equates to dark current of less than 0.000001 electrons/pixel/sec. Imagine the same camera delivering less than 1.75 electrons readout noise with minimal hot spots and blemishes while delivering a peak QE of 77%. To hit these specs it would need to be cooled significantly.

Posted in: Articles, Features, Photonics, Optics, Thermal management, Cooling
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Using Adaptive Optics to Perform Deep-Tissue Cell Imaging

In biological imaging, the object of interest is not always in plain sight. This is especially true when performing microscopy of cells buried deep within tissues. The tissues covering the cells tend to bend and scatter the light passing through them, which prevents acquiring sharp images of the cells below. To overcome this, researchers at a leading science campus developed a novel way to use adaptive optics in microscopy.

Posted in: Application Briefs, Applications, Photonics, Computer software and hardware, Microscopy, Optics, Biological sciences
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Laser Cutting System

The new CL-400 CO2 laser cutting system from Cincinnati Incorporated (Harrison, OH) uses the water-cooled, high-speed linear motor drives pioneered by Cincinnati, and the same powerful HMI touchscreen control and nesting software found on the company’s other CO2 and fiber laser cutting systems. Dual 5 × 10 ft. (1.5 × 3 m) pallets and an optional modular material handling system (MMHS) reduce beam-off time and further boost productivity. Designed for high throughput and all-around material versatility, the CL-400 delivers fast positioning speeds of 12,000 ipm and up to 1" processing range on mild steel.

Posted in: Products, Products, Photonics
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10 to 1000eV Spectrometer

The new McPherson (Chelmsford, MA) Model 248/310 spectrometer can easily make spectral measurements around 13 nanometers and throughout the extreme vacuum ultraviolet and soft x-ray wavelength region. It is ideal for work from 10eV to more than 1000eV. The spectrometer features one meter focal length optics built into a compact Rowland circle instrument. Grazing incidence angles used in the instrument deliver high reflective efficiency. For direct detection of extreme vacuum ultraviolet and soft x-ray wavelengths, windowless back illuminated CCD’s are used. Sensitivity of CCD’s at short wavelengths can surpass that in the visible spectral region. The CCD’s aggressive thermoelectric cooling also reduces readout noise. When gated detection is required, open microchannel plate intensifiers are available.

Posted in: Products, Products, Photonics
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Optical Fiber

Polymicro Technologies (Lisle, IL) has successfully developed a broad spectrum optical fiber with a low -OH pure silica core that demonstrates significantly reduced content of UV defects and other UV absorption centers. Polymicro’s proprietary FBPI fiber leverages the benefits and mitigates the limitations of standard optical fibers. Featuring improved transmission properties over a much wider spectral range, the silica-based, broadband FBPI fiber is available in a range of densities and can be produced in core diameters from 50-600 μm.

Posted in: Products, Products, Photonics
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Fast Axis Collimators

Edmund Optics (EO) (Barrington, NJ) has introduced new fast axis collimators. These versatile lenses are designed for beam shaping or laser diode collimation applications. Fast Axis Collimators are compact, high performance aspheric cylindrical lenses, designed for fast axis collimation. The combination of aspheric cylindrical lens designs and high numerical apertures (N.A.) deliver uniform collimation of the entire laser diode output while maintaining excellent beam quality. Fast Axis Collimators feature a standard AR coating for 790-990 nm and provide greater than 99% transmission across the designated spectral range. Fast axis collimators measure 12 mm long and are available in five models with focal lengths of 0.29 mm, 0.365 mm, 0.59 mm, 0.91 mm and 1.49 mm.

Posted in: Products, Products, Photonics
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45W UV Laser

Spectra-Physics® (Santa Clara, CA), a Newport Corporation brand, recently introduced Quasar 355-45, a UV laser that delivers >45W (225 μJ) at exceptionally high repetition rates. The laser features TimeShift™ technology for pulse shaping and burst-mode operation as well as programmable pulse widths from 100 ns over repetition rates from 0 to 1 MHz – factor of 2 improvements in repetition rate range and minimum pulse width over the recently introduced >40W Quasar 355-40.

Posted in: Products, Products, Photonics
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Choosing Chiller Pumps to Cool Medical Lasers

Medical lasers must be cooled either by premounted or portable chiller systems.

Laser systems continue to grow in application use throughout the medical industry. Applications for laser systems include diagnostic analysis systems, DNA sequencing systems, dental cleaning and surgery, skin care, eye surgery, tattoo removal, and much more. These systems commonly require cooling of the laser and other electronic components either by air flow on lower power laser systems, or by fluid circulation/chiller systems on higher power lasers. Higher power laser require an increased level of cooling capacity that results in systems that provide several gallons per minute of fluid circulation. This increased flow rate will maintain the laser and other electronics at the proper operating conditions.

Posted in: Briefs, MDB, Briefs, Custom & Contract Manufacturing, Mechanical Components, Drug Delivery, Medical, Lasers & Laser Systems, Photonics, Lasers, Medical equipment and supplies, Cooling, Pumps
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Micro-Endoscope as Thin as a Human Hair

Single fiber endoscope increases resolution fourfold over previous similar devices.

Engineers at Stanford University have developed and demonstrated a prototype single-fiber endoscope that, they say, quadruples the resolution over existing designs, which might lead to the development of needle-thin, minimally invasive endoscopes able to view features out of reach of today’s instruments.

Posted in: Briefs, MDB, Briefs, Electronics, Imaging, Diagnostics, Imaging, Medical, Patient Monitoring, Fiber Optics, Optics, Photonics, Downsizing, Fiber optics, Medical equipment and supplies
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New Material Enables Improved Ultrasound

Ultrasound technology could soon be improved to produce high-quality, high-resolution images, thanks to the development of a new key material by a team of researchers in the Department of Biomedical Engineering at Texas A&M University, College Station.

Posted in: Briefs, MDB, Briefs, Imaging, Materials, Metals, Bio-Medical, Diagnostics, Imaging, Medical, Patient Monitoring, Nanotechnology, Optics, Photonics, Imaging and visualization
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