NP250-2
Description and configuration
Specification
Diffraction gratings

Optical system of NP250-2

Optical scheme:modified Hill scheme, astigmatism-compensated, with two independent spectral 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 spectral 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
Wavelength repeatability:± 0.03 nm
Wavelength accuracy:± 0.06 nm
Wavelength step size:0.01 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
  • Wavelength repeatability: ±0.03 nm
  • Wavelength accuracy: ±0.06 nm
  • Wavelength step size: 0.01 nm
  • * For grating 1200 l/mm, wavelength 546 nm, detector pixel size 24 µm.

Drive

Motor:micro-stepper
Drive:worm
Step size:1.62 arc seconds
Accuracy:± 1 step
Maximal speed:10000 steps/s
  • Motor: micro-stepper.
  • Drive: worm.
  • Step size: 1.62 arc seconds.
  • Accuracy: ± 1 step.
  • Maximal speed: 10000 steps/s.

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
*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

  • *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:automated (stepper drive);
or 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 with automated control:± 1 µm
Repeatability when manually operated:± 1.5 µm
Reading accuracy (micrometer):2 µm
Step size (for automated):0.5 µm
Height:10 mm
(diaphragm-regulated from 0 up to 10 mm)
  • Control: automated (stepper drive); or 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 with automated control: ±1 µm

  • Repeatability when manually operated: ±1.5 µm

  • Reading accuracy (micrometer): 2 µm

  • Step size (for automated): 0.5 µm
  • Height: 10 mm (diaphragm-regulated from 0 up to 10 mm)

Ports

Number of ports:1 input, 2 output
*Output port repeatability across the wavelength:± 0.03 nm
Switching time:30 s
* For grating 1200 l/mm, wavelength 546 nm.
  • Number of ports: 1 input, 2 output

  • *Output port repeatability across the wavelength: ±0.03 nm

  • Switching time: 30 s
  • * For grating 1200 l/mm, wavelength 546 nm.

Control

Central control:on-board CPU
External control:PC
PC interface:Ethernet

  • Central control: on-board CPU

  • External control: PC

  • PC interface: Ethernet

Dimensions

Overall sizes (L x W x H):510 х 280 х 215 mm
Optical height:111 – 120 mm
Weight:14 kg
Electrical requirements:110 – 230 V 50/60 Hz
Power consumption:not more than 35 W
  • Overall sizes (L x W x H): 510 х 280 х 215 mm
  • Optical height: 111-120 mm
  • Weight: 14 kg
  • Electrical requirements: 110-230 V 50/60 Hz
  • Power consumption: not more than 35 W