In addition to the most successful 1,2” 2k
lenses In-Vision has designed an new 4k DCine Visionar Cinema Lens Range. In compliance with the guidelines of the
Digital Cinema Initiative (DCI) for Digital Cinema projection equipment, the
projection lenses provide outstanding performance and superb image quality for
use in 2k and 4k DLP Cinema® Projectors offered by companies such as Barco,
Belgium , NEC, Japan Christie, Canada.
All lenses fully comply with the DLP Cinema®
Projection Lens specification (defined by Texas Instruments as owner of the
DLP® technology) and even noticeably exceed all critical imaging quality
parameters, like image contrast, sharpness, distortion or color offset. Most
importantly the lenses are first of their kind providing such extensive zoom
ranges and 56% Off-axis shift range while maintaining image quality on the same
excellent level. These features enable extremely flexible use of the projector
equipment in a broad range of local space configurations. The excellent
performance and superb transmission of all projection lenses of the D-CINE
VISIONAR Zoom Lens series is resulting in extraordinary crisp and bright images
on the screen, making DLP Cinema® a real cineaste experience.
Specifications
:D-Cine-Visionar Long Throw Zoom Lens series UNIQUE FEATURES:
Designed for true 2k and 4k DLP Cinema® projection systems. Vertical
shift capability of 56 %,(i.e. optical axis of lens hits projection screen at
the bottom of the projected image). This exceeds the
nominal shift range in the DLP Cinema® Lens specification and any other lens
vendor for DLP Cinema® projection lenses by almost a factor of two. Restrictions
on projector positioning are significantly reduced. Full DLP Cinema®
certification by Texas Instruments.
- Lens Type: Strictly telecentric telephoto zoom lenses
- DLP Display Size: 2048 x 1080 pixels (13,68 micron pitch) and 4.096 x
2160 pixles ( 7,56 micron pitch)
- Throw Distance: ranging from 8 m to 45 m projection distance
- Lens Aperture: Telecentric f#/2.5 nominal
- Object field size: 40.7 mm
- Distortion: geometric < 1.0 % within object field
- MTF in production:
- MTF > 70% (Center) and > 50% (Corner) at 36 lp/mm
- MTF > 45% (Center) and > 20% (Corner) at 72 lp/mm
- Lateral Color Error:
- < 0.25 px Red-Green, < 0.50 px Blue-Green within 14 mm radial field
- < 0.50 px Red-Green, < 0.75 px Blue-Green within 20 mm radial field
- The new Lens series
will be a : 0,9-1,15 / 1,35-1,86:1
/ 1,46-2,10:1 / 1,65-2,60:1 Lens
Underlying
technology that is used or was developed to make this entry
viable for use in motion picture production:
Development of the D-CINE VISIONAR Long Throw Zoom Lens series has been executed
with the proprietary Optical Design Software and Optimization Package,
developed and owned by In-Vision. Special software features exhibit maximum
dedication on image performance features such as MTF contrast, distortion as
well as axial and lateral color shift. Special attention was given to integrate
\"green\" glass types to comply with RoHS (Restriction of the use of
certain hazardous substances), i.e. toxic substances. This restriction led to
significant challenges especially in using high refractive
glass due to their lower transmission in the blue spectral range compared
with non-RoHS glasses. Special anti-reflection coatings have been developed to
enhance blue transmission and to balance the overall spectral performance of
the projection lenses.
Also some of the high-refractive index RoHS-compliant glass types tend to
staining under normal room conditions. Special protective coatings have been
developed and applied to the critical lenses, hermetically sealing the lens
elements over lifetime of the equipment. Zoom lenses contain moving elements.
In the special case of the D-CINE VISIONAR Long Throw Zoom Lens series up to 4
independently moving elements support the extraordinary long zoom ranges, while
maintain image
performance at every combination of magnification and projection
distance.
Innovative concepts in the mechanical engineering for guiding the moving elements
have been developed and implemented to enable smooth moving without jolt. Methods have been developed to test at
subassembly level and to predict performance of each subassembly in the final
product. This enables identification of critical deviations and definition of
corrective actions already during very early
stages of the lens assembly. The result of this process is a massive enhancement
in error-free production output.
Background:
Digital Cinema Initiatives, LLC (DCI, www.dcimovies.com) was established in
March, 2002, and is a joint venture of Disney, Fox, Paramount, Sony Pictures
Entertainment, Universal and Warner Bros. Studios. DCI\'s primary purpose is to
establish and document voluntary specifications for an open
architecture for digital cinema that ensures a uniform and high level of technical
performance, reliability and quality control.
Celluloid film has been used to screen movies for more than 100 years. Nowadays,
the movie industry is at the transition from film to digital. Since 1999 Texas
Instruments\' DLP Cinema® microdisplay technology (www.dlp.com/cinema/) is used
by several major digital projector manufacturers (Barco, Christie Digital
Systems, NEC) to develop projectors, delivering clear, sharp, bright and
accurate images to movie theatres around the world. Since then the total number
of installed DLP Cinema® projectors grew to nearly 5,000 today, with theatres
located in 35 countries around the world.
In order to maintain consistently high standards and quality levels according
to requirements proposed by DCI, Texas Instruments has established very strong
thresholds and requirements on partners developing DLP Cinema® compliant
projectors and projection lenses.
