Plane Holographic Gratings for High Resolution Spectrometers (3000 grooves/mm or more)

plane-holographic-gratings-for-h.jpg
  • Higher groove density than conventional products (fewer than 2400 grooves/mm) enables higher optical resolution of spectrometers.
  • The grating grooves are produced by a holographic exposure method. Using this method ensures that the amount of stray light due to periodic errors is much less than mechanically ruled gratings.
  • Shimadzu’s replica technology provides high-quality products.
  • In addition to standard products, requests for special order products are available.

Code number for Standard items

Items Specifications
Code Number 498-016-601L-MG 434-026-601L
Spectral Range(nm) *1 118~360 190~400
Groove density
(grooves/mm)
4984 4342
Relative efficiency
(first-order light, 
non-polarized,
at Littrow mounting)
20% min.
(λ=220 nm)
28% min.
(λ=260 nm)
Coating Material *2 Al+MgF2 Al
Grating Type Equally spaced straight-groove replica grating *3
Blank Material *2 Soda glass
Dimensions *2 60±0.2(W)×60±0.2(H)×11.3±0.5(T)
Effective Area Total area less a 2mm strip around the perimeter
Groove density tolerance ±0.2%
Scratches and Digs  80-50  (in accordance with MIL-O-13830A)

*1  This is a reference value and not a guaranteed value.
*2  All products are customizable for customer requirements.
*3  The grating grooves are formed with resin.
*Be sure to prevent condensation as this can cause a significant deterioration of optical characteristics.
*The external appearances and specifications are subject to change without notice.
*RoHS compliant (Directive 2011/65/EU + (EU)2015/863)

Relative Efficiency

Relative Efficiency

* This is a reference value and not a guaranteed value.

Outline Drawing(This drawing is drawn as a third angle projection 

Outline Drawing

* The external appearances and specifications are subject to change without notice.

 

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