Model 231SS Spectrometer

Model 231SS (T) Basic type, one meter Seya-Namioka, vacuum UV scanning monochromator consisting of: stainless steel vacuum chamber; manual drive; wavelength counter accurate to ±1Å; kinematically mounted grating holder and bracket.

Completely assembled and factory tested. Less vacuum pumping system and instrument support table.

Specfications

Focal Length 1.0 meter concave grating

Angle between entrance and exit beams 70.25 degrees

f / No. 22.9

Wavelength Range <30 nm to 1200 nm

Wavelength Accuracy +/- 0.10 nm (with 1200 G/mm grating)

Wavelength Reproducibility +/- 0.005 nm (with 1200 G/mm grating)

Grating Ruled Area 30mm x 50 mm

Performance

Grating (G/mm) 1200 600 300

Wavelength Range From <30 to 300 600 1200

First Order Littrow Blaze (nm) 150 150 700

400 160

276

Resolution (nm) 0.025 0.05 0.10

Dispersion (nm/mm) .83 1.66 3.33

Wavelength Range at Focal Plane (nm) 43 86 172

McPherson, Inc.

7A Stuart Road, Chelmsford, MA 01824

Telephone (978) 256-4512 Fax (978) 250-8625 E-Mail mcp@mcphersoninc.com

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Focal Length	1.0 meter concave grating
Angle between entrance and exit beams	70.25 degrees
f / No.	22.9
Wavelength Range	<30 nm to 1200 nm
Wavelength Accuracy	+/- 0.10 nm (with 1200 G/mm grating)
Wavelength Reproducibility	+/- 0.005 nm (with 1200 G/mm grating)
Grating Ruled Area	30mm x 50 mm

Grating (G/mm)	1200	600	300

Wavelength Range From <30 to	300	600	1200

First Order Littrow Blaze (nm)	150	150	700
	400	160
	276

Resolution (nm)	0.025	0.05	0.10

Dispersion (nm/mm)	.83	1.66	3.33

Wavelength Range at Focal Plane (nm)	43	86	172