- 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)
