IRRADIATION DEVICE AND IMAGE-READING DEVICE

• Main Authors: SHOJI, TOSHIAKI, FUJIUCHI, AKIKO, MASUDA, AKIO, KOBAYASHI, NOBUTAKA
• Format: Patent
• Language: English; French; German
• Published: 10.12.2014
• Edition: 7
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BLASTING; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; HOLOGRAPHY; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

An irradiation device increasing the lighting depth and facilitating the assembling is provided. A transparent bar-shaped light guide (110) having LEDs disposed near ends thereof includes a first prism group (121) and a first reflector (111), and, a second prism group (123) and a reflector (112) which are provided so as to extend in a lengthwise direction and which diffuse and reflect light. The light guide (110) includes a first light outgoing area (122) emitting reflected light as primary light Lm, and a second light outgoing area (124) emitting reflected light as secondary light Ls. The first light outgoing area (122) includes a plane portion (136) forming a flat surface. A plane mirror (115) reflects the secondary light Ls in a direction overlapping the primary light Lm in a read area (105).