Accessories
attoMICROSCOPY – Accessories
PAGE 176
Accessories
optional items for the attoMICROSCOPY product line
Cryogenic Compatible, Achromatic High-NA Objectives
For more information
see page 44
Maximum collection efficiency. Low focal displacement.
Objective
LT-IWDO
compatible with..
numerical aperture (NA)
working distance
spectral range2
LT-LWDO
attoCFM I, II and III
LT-APO/VIS/0.82
LT-APO/VISIR/0.82
LT-APO/NIR/0.81
CFMI, AFM/CFM
attoDRY800
CFM I, AFM/CFM,
attoDRY800
CFM I, AFM/CFM,
attoDRY700
0.68
0.55
0.82
0.82
0.81
1.61 mm
2.68 mm
0.35 mm
0.65 mm (1.40 mm1)
0.70 mm (1.40 mm1)
400 .. 1600 nm2
400 .. 1600 nm2
350 nm-1600 nm
(>80% transmission)
400 nm-1000 nm
(>80% transmission)
400 nm-1000 nm
(>80% transmission)
465-600 nm
565-770 nm
700-985 nm
apochromatic range3
(δf < ±Δ)
aspheric
environments
cryogenic temperatures, high magnetic fields, high vacuum
(ultra-high vacuum on request)
clear aperture
5.0 mm
4.95 mm
6.5 mm
4.7 mm
4.7 mm
article number
1009849 (CFM I)
1007211 (CFM II/III)
1007212 (CFM I)
1003961 (CFM II/III)
1007209
1009414
1009503
Possible use with solid immersion lenses: half-ball radius < 0.65 (0.70) mm for unlimited lateral displacement or half-ball radius < 1.40 mm for coaxial approach only
1
Depending on anti-reflective (AR) coating: coating A 400-600 nm | coating B 600-1050 nm | coating C 1050-1600 nm | uncoated
2
δf: chromatic focal shift, Δ = n* λref / (2*NA2): depth of focus, n: refractive index, λref: wavelength used to define focal plane with max. Δ:
3
Naming Scheme
The different objectives offered are distinguished and described by the following naming scheme:
LT is short for “Low Temperature (compatible)”.
/VIS is short for “Visible”, indicating that the objective is most suitable for the visi-
IWDO is short for “Intermediate Working Distance Objective”.
ble wavelength range.
LWDO is short for “Long Working Distance Objective”.
/VISIR is short for “Visible to (near-)infrared”, indicating that the objective is most
APO is short for “Apochromatic”, and refers to the fact that the focal displacement
suitable for the visible to (near-infrared) wavelength range.
curve is flat (i.e. within plus/minus one depth of focus) within the specified apo-
/NIR is short for “Near-Infrared”, indicating that the objective is most suitable for
chromatic range (see specification sheets of the respective objectives for further
the near-infrared wavelength range.
details).
/0.82 is indicating the numerical aperture (NA) of the respective objective, in this
case NA = 0.82.