Imax Presentation
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Transcript of Imax Presentation
IMAXIMAX(LARGER THAN LIFE)LARGER THAN LIFE)
BY
PRIYA ADHAV (I.T.)PRIYA ADHAV (I.T.)
GUIDE
MRS.PRACHI DHANAWATMRS.PRACHI DHANAWAT
INTRODUCTION TO IMAXINTRODUCTION TO IMAX What is “IMAX” ?
Def -“IMAX integrated technology.”
Def-”IMAX integrated technology.”1. Film format 2. Screens3. Projector4. Digital sound system5. Theatre design6. 3D camera
FILM FORMATFILM FORMAT
PERFORATIONS->TINY HOLES ON THE FILM
Academy film Academy film formatformat
4/35film 4perf->height
35mm->width Perf are on both
sides Moves vertically Sound track is
added
IMAX filmIMAX film
formatformat
15/70 15perf->width
70mm->height Perf are on the top
& bottom Moves horizontally No sound track is
added
SCREENSSCREENS Screen size : IMAX screen->50 feet tall & 70 feet wide
IMAX flat screen->100 feet high
IMAX DOME screen->90 feet in diam small plates of Al with
20%area perforated with holes
IMAX PROJECTORIMAX PROJECTOR
Most advanced precise & powerful History IMAX projector ->24 frames/sec at rate of
334 feet/min Normal projector->24 frames/sec at rate of
90 feet/min Rolling loop, shutter mechanism & cam
controlled arm
Frame of the film is rolled onto registration pins over optical glass called “field flattenerfield flattener.”
Shutter mechanismShutter mechanism ->transmits 1/3rd more light, source is brighter, opened for 20% longer
Rolling loop-Rolling loop-:compressed-air “puffer” cylindrical lens
Height of lens , Pneumatic piston
Cam controlled armsCam controlled arms-->eliminate microscopic shaking
Fig:15 kw xenon short-arc lamp
Rolling Loop TechnologyRolling Loop Technology
Rolling loop projector system
Air valve Vacuum on the lens
Rotor
Input sprocket
Registration pins
Cam unit
Output sprocket
Rotary air valve
Fig: IMAX PROJECTORIMAX PROJECTOR
Fig: Input sprocketInput sprocket Fig: Cam unit & Cam unit & registration pinsregistration pins
Dome IMAX TheatreDome IMAX Theatre
OMNIMAX:OMNIMAX: 180 degrees
horizontally
100 degrees above the horizon
22 degrees below the horizon
Fig: Frame layout of IMAX Dome film
Features of OMNIMAXFeatures of OMNIMAX
Special fisheye lenses
Lens optically centered 9.4mm above film horizontal center line projected elliptically on a dome screen
IMAX Dome ProjectorIMAX Dome Projector
For tilted planetarium Surface area->1000 sqm Uses->800 sqm Screen
IMAX 3-D ProjectorIMAX 3-D Projector
Projects 2 separate images 3-d polarized glasses
IMAX SOUND SYSTEMIMAX SOUND SYSTEM High sound quality Sound reproducer->”Dubber” Interlock circuit 6 channel DTAC (‘Digital Theatre Audio Control’) New sound system->KANGA Dolby Digital & DTS DDP is replaced by DTAC
Fig 1.8: The layout of the new ,Dolby Digital sound system Fig 1.8: The layout of the new ,Dolby Digital sound system
Fig 1.9:A typical layout for theatrical “5.1” digital sound.The exact Fig 1.9:A typical layout for theatrical “5.1” digital sound.The exact placement & number of speakers may varyplacement & number of speakers may vary
3-D Camera3-D Camera Incorporation of 2 camera movement
Uses either 3d glasses or liquid-crystal shutter glasses
2 camera lenses->left eye & right eye
2 lenses separated by intraocular distance of 64 mm
3D illusion3D illusion
PolarizationPolarization E3DE3D
Images polarized perpendicularly
2 images simultaneously
Polarization effect
Alternate images
1 image momentarily
Transparent & opaque efffect
IMAX
IMAX
PROJECTOR
#1 LEFT POLARIZER
#2 RIGHT POLARIZER
#3 SCREEN
#4 POLARIZED LIGHT FROM PROJECTORS BOUNCES BACK
#5 CROSS POLARIZING GLASSES
L R
THANK YOUTHANK YOU