Lighting system and digital cinema projection apparatus employing same
First Claim
1. A lighting system for a digital cinema projection apparatus, the lighting system comprising:
- an ultra high pressure mercury lamp for emitting a light beam;
a relay lens group for receiving the light beam and adjusting an optical path of the light beam;
a digital micro display module;
an optical filter module comprising a notch filter and a neutral density filter is arranged along the optical path of the lighting system, said notch filter is for optically modulating an optical spectrum and said neutral density filter is for modulating a white balance of the light beam from the ultra high pressure mercury lamp so as to filter off at least 10% of green light and 15% of blue light of said light beam from the ultra high pressure mercury lamp; and
a projection lens for projecting the modulated light beam as an image beam.
1 Assignment
0 Petitions
Accused Products
Abstract
A lighting system for a digital cinema projection apparatus is provided. The lighting system includes an ultra high pressure mercury lamp, a relay lens group, a digital micro display module, an optical filter module, and a projection lens. The ultra high pressure mercury lamp is used for emitting a light beam. The relay lens group is used for receiving the light beam and adjusting an optical path of the light beam. The optical filter module is arranged along the optical path of the lighting system for optically modulating an optical spectrum and/or a white balance of the light beam from the ultra high pressure mercury lamp. The projection lens is used for projecting the modulated light beam as an image beam.
7 Citations
13 Claims
-
1. A lighting system for a digital cinema projection apparatus, the lighting system comprising:
-
an ultra high pressure mercury lamp for emitting a light beam; a relay lens group for receiving the light beam and adjusting an optical path of the light beam; a digital micro display module; an optical filter module comprising a notch filter and a neutral density filter is arranged along the optical path of the lighting system, said notch filter is for optically modulating an optical spectrum and said neutral density filter is for modulating a white balance of the light beam from the ultra high pressure mercury lamp so as to filter off at least 10% of green light and 15% of blue light of said light beam from the ultra high pressure mercury lamp; and a projection lens for projecting the modulated light beam as an image beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A lighting system for a digital cinema projection apparatus, the lighting system comprising:
-
an ultra high pressure mercury lamp for emitting a light beam; a relay lens group for receiving the light beam and adjusting an optical path of the light beam; a digital micro display module; an optical filter module comprising a notch filter and a neutral density filter is arranged along the optical path of the lighting system, said notch filter is for optically modulating an optical spectrum and said neutral density filter is for modulating a white balance of the light beam from the ultra high pressure mercury lamp so as to filter off at least 10% of green light and 15% of blue light of said light beam from the ultra high pressure mercury lamp, wherein said notch filter has a notch wavelength range between 535 nm and 625 nm; and a projection lens for projecting the modulated light beam as an image beam.
-
-
13. A digital cinema projection apparatus, comprising:
-
a lighting system comprising; an ultra high pressure mercury lamp for emitting a light beam; a relay lens group for receiving the light beam and adjusting an optical path of the light beam; a digital micro display module; an optical filter module comprising a notch filter and a neutral density filter is arranged along the optical path of the lighting system, said notch filter is for optically modulating an optical spectrum and said neutral density filter is for modulating a white balance of the light beam from the ultra high pressure mercury lamp so as to filter off at least 10% of green light and 15% of blue light of said light beam from the ultra high pressure mercury lamp; and a projection lens for projecting the modulated light beam as an image beam; and a projection screen, wherein the image beam is projected on the projection screen.
-
Specification