NP250-2M
Description and configuration
Specification
Diffraction gratings

Optical system of NP250-2M

Optical scheme:modified Hill scheme, astigmatism-compensated, with two independent channels
Usable wavelength range:185 nm – 60 µm (depends on the type of grating)
F/number (common):1/4.2
F/number (for each channel):1/6.1
Focal length:270 mm
Scanning range limited by the grating rotation angle:1280 nm (grating 1200 l/mm)
Main mirrors:off-axis parabolic
Stray light:2.5*10-5 (20 nm from laser line 632.8 nm)
  • Optical scheme: modified Hill scheme, astigmatism-compensated, with two independent channels
  • Usable wavelength range: 185 nm – 60 µm (depends on the type of grating)
  • F/number (common): 1/4.2
  • F/number (for each channel): 1/6.1
  • Focal length: 270 mm
  • Scanning range limited by the grating rotation angle: 1280 nm (grating 1200 l/mm)
  • Main mirrors: off-axis parabolic
  • Stray light: 2.5*10-5 (20 nm from laser line 632.8 nm)

Astigmatism compensation

Horizontal magnification:1.09
Vertical magnification:1
Vertical spatial resolution at the center of the field:2 µm
Vertical spatial resolution at ±10 mm from the center of the field:0.2 mm
Focal plane:25 х 8
  • Horizontal magnification: 1.09
  • Vertical magnification: 1
  • Vertical spatial resolution at the center of the field: 2 µm
  • Vertical spatial resolution at ±10 mm from the center of the field: 0.2 mm
  • Focal plane: 25 х 8

Optics*

Reciprocal linear dispersion:2.91 nm/mm
Spectral resolution of PMT (slit width 10 µm):0.07 nm
Spectral resolution of digital camera (14 µm pixel):0.08 nm
* For grating 1200 l/mm, wavelength 546 nm, detector pixel size 24 µm.
  • Reciprocal linear dispersion: 2.91 nm/mm
  • Spectral resolution of PMT (slit width 10 µm): 0.07 nm
  • Spectral resolution of digital camera (14 µm pixel): 0.08 nm
  • * For grating 1200 l/mm, wavelength 546 nm, detector pixel size 24 µm.

Drive

Motor:manually
Drive:worm
  • Motor: manually

  • Drive: worm

Diffraction gratings

Number of changeable gratings:unlimited
Number of simultaneously installed gratings:2
Size of grating:50 х 40 х 10 mm
Fixation of gratings:positioner for 1 manually changeable grating
Rotation method:about the center of grating working surface, the orientation of the rotation axis coincides with orientation of grating lines
*Grating positioning repeatability, across the wavelength:± 0.02 nm
*Grating positioning repeatability, to vertical image position:± 0.2 mm
* For grating 1200 l/mm, wavelength 546 nm.
  • Number of changeable gratings: unlimited
  • Number of simultaneously installed gratings: 2
  • Size of grating: 50 х 40 х 10 mm
  • Fixation of gratings: positioner for 1 manually changeable grating
  • Rotation method: about the center of grating working surface, the orientation of the rotation axis coincides with orientation of grating lines
  • *Grating positioning repeatability, across the wavelength: ±0.02 nm
  • *Grating positioning repeatability, to vertical image position: ±0.2 mm
  • * For grating 1200 l/mm, wavelength 546 nm.

Spectral slits

Control:manual, with micrometer screw
Opening width:smoothly regulated from 0 up to 2.0 mm
working slit width from 0 up to 0.4 mm
Parallelism:± 1 µm
Accuracy
(slit width 1 mm):		± 10 µm
Repeatability:± 1 µm
Reading accuracy (micrometer):2 µm
Height:10 mm
(diaphragm-regulated from 0 up to 10 mm)
  • Control: manual, with micrometer screw
  • Opening width: smoothly regulated from 0 up to 2.0 mm, working slit width from 0 up to 0.4 mm
  • Parallelism: ±1 µm
  • Accuracy (slit width 1 mm): ±10 µm
  • Repeatability: ±1 µm
  • Reading accuracy (micrometer): 2 µm
  • Height: 10 mm (diaphragm-regulated from 0 up to 10 mm)

Ports

Number of ports:1 input, 1 output
  • Number of ports: 1 input, 1 output

Dimensions

Overall sizes (L x W x H):385 х 280 х 215 mm
Optical height:111 – 120 mm
Weight:10 kg
  • Overall sizes (L x W x H): 385 х 280 х 215 mm
  • Optical height: 111-120 mm
  • Weight: 10 kg