Patent ID: 6227686
Filing Date: 2001-05-08
Classification: F21V,G03B

Abstract:
A light source apparatus comprising:a luminescent tube;a reflecting mirror including a large opening for light emission, a small opening used for holding said luminescent tube, and a light reflection surface disposed to encircle said luminescent tube;a holding member disposed to block a part of said small opening, said holding member holding said luminescent tube in said reflecting mirror;a light transmitting protection plate for blocking said large opening;a ventilator for sucking air inside said reflecting mirror through said small opening and sending out the air through an outlet of the ventilator; anda housing for combining said reflecting mirror and said ventilator so as to form a channel for directing the air sucked through said small opening toward said ventilator;said reflecting mirror including an air inlet disposed closer to said large opening than a center position of said luminescent tube;wherein an opening area of said air inlet is smaller than an area of a gap of said small opening which is left unblocked by said luminescent tube and said holding member.