CAFÉ MAIN FEATURES

Design

Telescope

Resolution

Wavelength

Sensitivity

N. of orders

Echelle spectrograph

Calar Alto 2.2m

62000±5000

3960 - 9500A

SNR 30 mag 14.5 2700s

84;  from 60 to 143.

 

 

TELESCOPE MODULE

Calibration lamps

Aperture

Hal and ThAr

2.4 arcsecons (200μm)

 

OPTICAL FIBER

Type

Length

Inner protection tube

Outer protection tube

Micro-lenses

Polymicro FBP100140170

17.5m

ETFE with Kevlar for strain relief

Stainless steel tube

N-F2, both ends

 

 

OPTICAL DESIGN

Optical bench

Entrance slit width

Grating

Collimator1

Collimator2

Prisms

Camera

CCD

Pneumatic isolator

2400 x 1200 x 203mm

100μm

31.6 g/mm BA1=63.9 degrees λ/20

λ/20 FL=60.0”D=10.0”OAD=7.0”

λ/20 FL=60.0”D=10.0”OAD=9.0”

Prisms LF5, Deviation angle 33 degrees

f/3

IKON-L DZ936 back illuminated

Newport I-2000