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T6 - Concave Holographic Reflectance Gratings
for Flat-Field Spectrographs

For the gratings listed in Parts A and B of this table, the figure at left defines the following parameters:
a incidence angle
r distance from entrance slit to grating center
b diffraction angle
r' distance from grating center to image

The angles a  and b  are measured from the grating normal; their algebraic signs are opposite if they lie on opposite sides of the normal.

Gratings in this table are listed in order of increasing groove frequency (grooves per mm).

Click catalog number link
to view specification sheet(s).		 List of Product Tables

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Select additional display columns: Imaging Range RLD Entrance Slit l1 focus l2 focus Input f/no
Catalog
Number		 Grooves
per mm		 Concave
Radius (mm)		 l1 focus
r' and b
(mm, deg)		 Input
f/no		 Ruled Area
(Groove Length x
Ruled Width, mm)		 Substrate
Size (mm)		 Request a quote
52056BK-*-028C  200 152.4 153,2,-8.3 3.5 Ø44 Ø50.0 quote
52066BK-*-018C  233.9 131.53 116-5.6 2.5 Ø60 Ø63.5 quote
52067BK-*-040C * 282.7 224.4 219, 8.4 3.9 Ø60 Ø63.5 quote
4.2 quote
52066BK-*-001C  454.27 131.53 130, -3.8 2.2 Ø58 Ø63.5 quote
52057BK-*-014C  435.9 112.2 114, 10.9 2.3 Ø47 Ø50.8 quote
52034BK-*-004C  664 78.08 80, 0.2 2.7 Ø29 Ø32.0 quote
52001BK-*-021C  792.8 210.8 225, 15.4 2.4 Ø95 Ø100.0 quote
52066BK-*-002C  813.5 131.53 128, -4.0 2.2 Ø60 Ø63.5 quote
52097BK-*-207C  430 86.4 86.3, 12.2 2.9 Ø35 Ø37 quote
52049BK-*-012C  1300 100 99, 4.3 2.9 Ø38 Ø42.0 quote
52064BK-*-008C  1803.8 302.5 387, -25.8 6.3 50 x 50 Ø62.5 quote
52071BK-*-007C  2197 352 288, -43.9 10.5 Ø55 Ø70.0 quote
52097BK-*-208C  430 86.4 85.4, 17.3 2.9 Ø35 Ø37 quote
52097BK-*-209C  430 86.4 86.1, 13.5 2.9 Ø35 Ø37 quote

RLD - reciprocal linear dispersion

* This flat-field spectrograph grating is designed to produce two aberration-corrected spectra in the same place (using different entrance slit locations).

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