Plane Holographic Gratings for High Resolution Spectrometers (3000 grooves/mm or more)
- 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
* This is a reference value and not a guaranteed value.
Outline Drawing（This drawing is drawn as a third angle projection 
）
* The external appearances and specifications are subject to change without notice.