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Planar Diffraction Grating One Dimensional Holographic Interference Spectrometer
$33.48
Size: 20x20mm
Thickness: 2mm
Material: Float Glass
Wavelength Range: 200nm ~1000nm
Holographic grating:
The grating made by holographic technology uses the principle of optical coherent superposition. Simply speaking, by adjusting the complex term (time term), the peaks, peaks and valleys of the two optical wave trains are superimposed to achieve a high coherent field. Contrast technology.
The grating line groove manufactured by this method has high density and large scribing width, and the score line can reach 3663～4234 lines/mm, and the area can reach 165×320mm2.
The holographic grating has no ghost lines, and the stray light is small, which can eliminate the inherent shortcomings of the machine-engraved grating. Its actual resolving power can reach 80% to 100% of the theoretical resolving power.
Process:
The optically stable flat glass blank is coated with a layer of photoresist or other photosensitive material with a given thickness.
When two coherent beams are generated by the laser to produce a series of uniform interference fringes on the coating, the photosensitive material is photosensitive.
Then use special solvent to ablate the photosensitive part, that is, obtain a holographic image of interference fringes on the etched layer. The prepared diffraction grating; if a layer of aluminum reflective film is coated on the back of the glass blank, a reflective diffraction grating can be made.
The grating line groove manufactured by this method has high density and large scribing width, and the score line can reach 3663～4234 lines/mm, and the area can reach 165×320mm2.
The holographic grating has no ghost lines, and the stray light is small, which can eliminate the inherent shortcomings of the machine-engraved grating. Its actual resolving power can reach 80% to 100% of the theoretical resolving power.
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Planar Diffraction Grating One Dimensional Holographic Interference Spectrometer$33.49
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