ㆍ Replica gratings from master holographic gratings recorded in concave substrates
ㆍ Perfect periodicity of grooves
ㆍ Very low stray light compared to concave ruled grating
ㆍ Grating preferably used in mountings based on Rowland circle
     - slit is located in a circle equal to the radius of curvature of the grating
     - allow to obtain high resolution spectrograph
ㆍ Substrate materials: Pyrex, Zerodur

Fig. 1: Grating on Rowland circle

 

Product Management and Quality ISO 9001 and ISO 14001 certified Unique traceability with laser marking State-of-the-art metrology  ITAR free products Clean room storage of master gratings RoHS / REACH compliant products

Customer Oriented and Confidentiality Full confidentiality with mutual NDA Blanket orders for large annual quantities Long term relationship with co-designing Three production facilities

 

ㆍ Groove frequencies ranging from 80 to 3400 g/mm
ㆍ Spectral ranges: from 60 to 800 nm
ㆍ Diffraction efficiency optimized for UV, or Vis, or NIR
ㆍ Radius of curvature : from 112 to 1500 mm
ㆍ Dimensions: from 30 x 30 mm
ㆍ For customers in need of larger dimensions, HJY can record a custom-made holographic grating master specifically for replication.

Fig. 2: Typical efficiency curve* for 531 06, 2400 l/mm, 200-400 nm

 

*This efficiency curve is absolute theoretical efficiency, calculated using rigorous electromagnetic theory, taking into account the true groove profiles of manufactured gratings measured with an atomic force microscope (AFM).