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Kind of Diffraction Gratings |
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Plane Diffraction Gratings |
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A wide variety of high performance, mechanically-ruled diffraction gratings. |
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- The ruling engine equipped with a highly sensitive laser interferometer is able to rule grating grooves with ultrahigh accuracy, and realizes high resolution spectroscopic instruments.
- Burnishing process, by using a diamond tool, serves to form triangularly shaped echelette grooves whose surfaces are extremely smooth yielding minimum stray light.
- The grooves, having an exact blaze angle, can be formed by selecting an appropriate diamond tool and measuring the groove profiles with a scanning electron microscope. These processes allow the grating to provide a highly efficient diffraction efficiency in the designed wavelength region.
- Grating grooves having 2 or more different blaze anoles can be combined on a single diffraction grating. This structure allows for broader wavelength coverage.
- A variety of diffraction gratings with variable spaced grooves and shapes are manufactured.
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Concave Diffraction Grating |
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From X-rays to Infrared! Gratings can now be designed to meet specific requirements. |
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- Coma-type aberration-corrected concave grating for high resolution Seya-amioka monochromator:
This grating eliminates the coma-type aberration of the Seya-Namioka monochromator, which has been most widely used in monochromators with concave gratings that provide high resolution. Hitachi is manufacturing a wide variety of aberration-corrected gratings for Seya-Namioka monochromator which cover a wavelength range from the vacuum ultra-violet to the near infrared region.
- Diffraction gratings for compact, high efficiency monochromator:
These gratings are designed for normal incidence mounting. They reduce aberrations and at the same time increase the efficiency of light intensity.
A as a result, a high quality of image focusing of the concave grating is available.
- Diffraction gratings for flat field spectrograph:
Variable space grooves enable flat-field image focusing of concave grating spectrograph. The spectrograph permits simultaneous measurement of multi-wavelength spectra when combined with a linear array detector. Gratings are designed optimally for the grazing-incidence optical system (for soft X-ray) and the normal incidence optical system (for VIS-UV ray), respectively.
- Diffraction gratings for multi wavelength optical communication:
A compact and efficient aberration corrected concave grating is manufactured for transmitting multiple wavelength light beams through an optical fiber and acts to separate the beams at the receiving terminal.
- Diffraction gratings for soft X-rays:
Highly dispersive concave gratings for grazing-incidence mounting are available especially used for synchrotron radiation and extreme ultra-violet applications. These gratings are very effective for the application of soft x-rays whose reflectance is extremely low on a metal surface.
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Product Information |
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