Optical system

Modified Hill scheme, astigmatism-compensated, with two independent channels

185 nm – 60 µm (depends on the type of grating)

• common

1/4.2

• for each channel

1/6.1

270 mm

0 – 1280 nm

Off-axis parabolic

2.5 x 10 ^-5

Astigmatism compensation

1.09

1

• at the field center

2 μm

• at 10 mm from the field center 

200 μm

25 х 8 mm

Ports

1 input, 2 outputs

± 0.03 nm

30 s

Drive

micro stepper

worm

1.62 arc seconds

± 1 step

10 000 steps/s

Optics (for grating 1200 l/mm, wavelength 546 nm, detector pixel size 24 µm)

2.91 nm/mm

• PMT (slit width 10 µm)
  

0.07 nm

• digital cameras (14 µm pixel)
  

0.08 nm

±0.03 nm

±0.06 nm

0.01 nm

Gratings

 Number of changeable gratings

2

50 х 40 х 10 mm

Positioner for 1 manually changeable grating

About the center of grating working surface

• across the wavelength
  

±0.02 nm

• vertical image position
  

±0.2 mm

Control

On-board CPU

PC

Ethernet

Dimensions

510 х 280 х 215 mm

 Optical height

14 kg

110 – 230 V 50/60 Hz

Not more than 35 W