Zeizz Primo Star, Руководство по эксплуатации, Страница: 13 / 306

Primo Star / Primo Star iLED Description Carl Zeiss
M60-2-0011 v 08/2008
13
En
g
lish
−
Backward inclined quadruple objective nosepiece with W 0.8 lens thread running on ball bearing
−
Infinity-corrected "Plan-ACHROMAT" objectives with magnifications of 4x, 10x, 40x and 100x/Oil for
brightfield, darkfield and phase contrast as well as for oil immersion applications (100x/Oil)
− Binocular tube or binocular phototube (50% vis, 50% doc) with ergonomically favorable tube angle of
30° with adjustable interpupillary distance and viewing height
− 10
×
adjustable eyepieces for field-of-view numbers 18 or 20, suitable for spectacle wearers
2.4 Objectives
The objectives are the optical heart of the microscope. The objectives may be labeled as follows:
Plan-ACHROMAT 10x/0.25
∞
/-.
Where:
10
×
Objective magnification,
with a defined color ring on the
objective being assigned to each
magnification step (Carl Zeiss color code)
0.25 Numerical aperture
∞
Infinite mechanical tube length
−
Usable with cover glass thickness D = 0 or
0.17 mm
0 Usable without cover glass
or
0.17
Usable with cover glass thickness
D = 0.17 mm
Other labels:
Oil
Oil immersion objective
Ph Phase contrast objective with green
inscription
Objective magnification multiplied by eyepiece magnification results in overall visual magnification, e.g.
10 x 10 = 100x.
Numerical aperture multiplied by 1000, e.g. 0.25
×
1000 = 250
×
, presents the maximum useful
magnification; there is no resolution for further details above that limit.
When immersion objectives are used, the air between the cover glass and the objective is replaced by a
liquid, which in most cases is immersion oil. The plastic oiler containing 5 ml of immersion oil is
particularly suitable for this purpose.
Because of their short working distances, the 20x, 20x/Ph 2, 40x, 40x/Ph 2, 100x,100x/Oil, and 100x/Ph 3
Oil objectives are equipped with resilient mounts for specimen protection.
Fig. 4 Objective