14
15
Short focal lens
VPLL-ZP310
Middle focal lens
VPLL-ZP400
Long focal lens
VPLL-ZP550
Lens diagram
Uses ED glass-forming
materials.
The Carl Zeiss lens on the projector delivers
exact resolution and projection of pictures
with pixels of 9 µm. The lens, consisting of
15 elements in 13 groups embedded in a
machined aluminum cam, is made of glass
covered with a full multi-AR (Anti-Reflection)
coating. These lenses have enormously high
transmission capabilities. ED (Extra-low
Dispersion) glass-forming materials are
incorporated into 6 of 15 elements for the
short focal lens, or 5 for the middle or long
focal lens. These innovations have achieved
high quality imaging by preventing colors
from blending.
Every lens is evaluated for performance by
the MTF (Modulation Transfer Function) and
have demonstrated a uniform performance
level. The name and serial number that Carl
Zeiss assigns to each Zeiss lens are proof of
the quality of the products.
Exquisite detail
— Carl Zeiss lens
Internal structure
MTF Diagrams
The Modulation Transfer Function (MTF) is an objective
method used to clearly represent and evaluate the
performance of lenses. In the diagrams, the horizontal
axis gives the real image height in mm (the distance
Short focal lens VPLL-ZP310
Middle focal lens VPLL-ZP400
Long focal lens VPLL-ZP550
Spatial frequency 56 lp/mm (sagittal)
Spatial frequency 56 lp/mm (meridional)
Spatial frequency 80 lp/mm (sagittal)
Spatial frequency 80 lp/mm (meridional)
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f=25mm
f=33mm
M
T
F
Real image height (mm)
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f=32mm
f=45mm
M
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f=44mm
f=61mm
M
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between the center and any corner of the image), and
the vertical axis gives the contrast when the spatial
frequency is 56 lp/mm and 80 lp/mm. Each lens for this
projector is measured for high resolution and contrast.
Real image height (mm)
Real image height (mm)
Real image height (mm)
Real image height (mm)
Real image height (mm)
Overview