attoMICROSCOPY – Accessories
PAGE 172
Objective
LT- IWDO
LT- LWDO
LT-APO / UV-A / 0.81
compatible with . attoCFM I , II and III attoDRY800
numerical aperture ( NA )
LT-APO Low Temperature Compatible Objectives maximum collection efficiency . low focal displacement .
working distance 1.61 mm 2.5 mm
LT-APO / VIO / 0.81
LT-APO / VIS / 0.82
CFM I , AFM / CFM , attoDRY800
LT-APO / VISIR / 0.82
CFM I , AFM / CFM , attoDRY800
LT-APO / NIR / 0.81
CFM I , AFM / CFM , attoDRY800
0.68 0.55 0.81 0.81 0.82 0.82 0.81
0.69 mm |
0.67 mm |
0.65 mm |
0.65 mm |
0.70 mm |
( 1.40 mm ) ( ¹ ) |
( 1.40 mm ) ( ¹ ) |
( 1.40 mm ) ( ¹ ) |
( 1.40 mm ) ( ¹ ) |
( 1.40 mm ) ( ¹ ) |
AR coating (> 80 % trasnmission )
apochromatic range ( ³ ) ( δf < +/ - Δ )
400 .. 1600 nm ( ² ) 400 .. 1600 nm ( ² ) 300 .. 800 nm ( 4 ) 300 .. 800 nm ( 4 ) 400 .. 1000 nm 400 .. 1000 nm 400 .. 1000 nm
aspheric 350 .. 395 nm 405 .. 470 nm 465 .. 590 nm 565 .. 770 nm 700 .. 985 nm
environments cryogenic temperatures , high magnetic fields , high vacuum ( ultra-high vacuum on request ) clear aperture 5.0 mm 4.95 mm 4.7 mm 4.7mm 4.7 mm 4.7 mm 4.7 mm focal length 2.91 mm 2.89 mm 2.87 mm 2.87 mm 2.93 mm mass 43 g 43 g 43 g 43 g 43 g diameter 17.8 mm 17.8 mm 17.8 mm 17.8 mm 17.8 mm length 48.35 mm 48.35 mm 48.35 mm 48.35 mm 48.35 mm
suitable broadband collimator
RT-APO / VIS-NIR / 0.13 RT-APO / UVA-VIS RT-APO / VIS-NIR / 0.13
RT-APO / VIS-NIR / 0.13 & RT-APO / NIR-IR
article number |
1009849 ( CFM I ) 1007211 ( CFM II / III ) |
1007212 ( CFM I ) 1003961 ( CFM II / III ) |
on request |
1011767 ( CFM I ) 1011768 ( CFM I xs ) |
1011769 ( CFM I ) 1011770 ( CFM I xs ) |
1011771 ( CFM I ) 1011772 ( CFM I xs ) |
(
¹ ) 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 (
² ) 4 options available : coating A 400-600 nm | coating B 600-1050 nm | coating C 1050-1600 nm | uncoated (
³ ) 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 ( 4 ) glas transmission : see respective objective data sheets
( 5 ) RT-APO : > 96 % transmission
Naming Scheme
The different objectives offered are distinguished and described by the following naming scheme :
RT is short for “ Room Temperature ( compatible )“. LT is short for “ Low Temperature ( compatible )”. IWDO is short for “ Intermediate Working Distance Objective ”. LWD is short for “ Long Working Distance ”. LWDO is short for “ Long Working Distance Objective ”. APO is short for “ Apochromatic ”, and refers to the fact that the focal displacement curve is flat ( i . e . within plus / minus one depth of focus ) within the specified apochromatic range ( see specification sheets of the respective objectives for further details ).
/ UV-A indicates that the objective is most suitable in the upper blue range / VIO indicates that the objective is most suitable in the ultra-violett to visible range / VIS indicates that the objective is most suitable for the visible wavelength range . / VISIR indicates that the objective is most suitable for the visible to ( near- ) infrared wavelength range . / IR indicates that the objective is most suitable in the lower infrared range / NIR indicates that the objective is most suitable for the near-infrared wavelength range . / 0.82 is indicating the numerical aperture ( NA ) of the respective objective , in this case NA = 0.82 .