Aberration-corrected Toroidal Gratings for Flat-field Polychromators
- The toroidal diffraction gratings are made by aspheric blanks where each curvature of orthogonal two axes (meridional and sagittal) is different.
- The toroidal diffraction gratings are formed on toroidal (aspheric) blanks that can correct astigmatisms.
- The toroidal diffraction gratings, which are produced by holographic exposure method and ion-beam etching technology, have low stray light and high efficiency.
Specifications
| Code Number | P0550-01TR | P0550-02TR |
|---|---|---|
| Grating Type | Unequally spaced curved-groove replica grating*1 | |
| Blank Material | Soda glass | |
| Dimensions | 30±0.2(W)×30±0.2(H) (mm) | |
| Central Thickness | 7±0.5(T) (mm) | |
| Effective Area | Total area less a 2mm strip around the perimeter | |
| Wavelength range | 340 to 900nm | |
| Groove Density (at center of grating) |
550±2 grooves/mm | |
| Nominal Blaze Wavelength*2 | 340nm | 400nm |
| Relative diffraction efficiency | 50% min. ( at nominal wavelength ) | |
| Coating (vacuum evaporation) | Aluminum | |
| Scratches and Digs | 80-50 ( in accordance with MIL-O-13830A ) | |
*1: The grating grooves are formed with resin.
*2: Nominal blaze wavelength is the wavelength of the maximum diffraction efficiency (target) with the design mounting. No one to guarantee the wavelength of the maximum diffraction efficiency.
※RoHS compliant (Directive 2011/65/EU + (EU)2015/863 on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment)
* In the interests of product improvement, the external appearance and specifications are subject to change without notice.
Outline Drawing
Example of Optical Mount (Polychromator)
