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VPH Gratings
The volume phase holographic (VPH™) grating technology revolution began at Kaiser Optical Systems, Inc. (KOSI) when astronomers discovered the benefits of using VPH transmission gratings in the world's foremost optical telescopes. Today, VPH transmission gratings are deployed in world-class optical telescopes throughout the world. Volume-phase holographic gratings and their potential
for astronomical applications High diffraction efficiency, and environmental durability are trademark attributes of the VPH transmission grating. Given a VPH grating's low scatter, smooth spectral response, and wavelength tunability, along with more than twenty years of experience in the design and production of high quality holographic optics and you know why professional astronomers turn to KOSI when requirements are the most demanding. KOSI also offers a special patented VPH grating assembly called the HoloPlex™ incorporating two separate gratings into one package. Each component grating interacts with a different spectral range than the other producing two distinct and spatially separated spectra. This unique arrangement allows collection of broadband spectral data at high resolution by a 2D detector array or physically different detectors. Astronomical Applications of Volume-Phase Holographic
Gratings Transmission VPH gratings offer another unique advantage referred to as the Super Blaze. Adjusting the grating angle with respect to the incident light causes a shift in the peak wavelength response. This means a single grating can offer very high diffraction efficiency over a wider range of wavelengths just by changing the angle of incidence of the incident light. Spectrographs optimized to take advantage of this feature can have a lower overall cost by reducing the number of gratings in inventory and less downtime to exchange gratings while improving overall spectral throughput. Evaluation of volume-phase holographic grating technology (SPIE 2001)
For additional information, contact Jim Arns at (734) 665-8083 or gratings@kosi.com.
Custom VPH Gratings | Telecommunications Gratings | Ultrafast Laser Gratings |
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