1. LASER EMITTING MODULE, WINDOW CAP, LASER POINTER, AND LIGHT EMITTING MODULE Kara Lambson OPT 310

2. General Info Title: Laser Emitting Module, Window Cap, Laser Pointer, and Light Emitting Module; US 7447243 B2 Filed: August 29, 2005 Issued: November 4, 2008 Inventors: Masayoshi Aoshima, Eiji Otani (JP) - Aoshima: 9 other patents - Otani: 17 other patents Assignee: Sony Corporation, Tokyo (JP) - ~158,000 patents

3. Need for Invention Light emission from laser pointers restricted to >1mW for safety reasons Low relative visibility from red light laser diode, difficult for human eyes to discern indicated position which is being illuminated by the pointer during presentation using projector

4. Invention Uses: Spot light for pointing to referring portion during presentation; point out any portion on the screen from a distance with easier handling than a rod-like pointer, and compacter in size Light emitted from laser diode excited solid-state laser medium to generate lights of different wavelengths Convert wavelength via non-linear optical element to emit a laser beam of short wavelength by second harmonic generation Alternative laser pointer using laser beam in range of wavelengths that can provide higher relative visibility factor than red light Dissipated heat management

6. Prior Art Same solid state laser with many of the same elements and wavelength output Efficiency dependent on temperature  temperature control device required Deterioration of the visibility of a region spot-lighted while laser beam varies unstably due to temperature High failure rate due to all elements arranged in single casing (dust during assembly)

7. Distinction from Prior Art Contains heat sink to dissipate heat from laser diode and optical resonator  stabilized temperature Airtight material to ensure window cap and internal elements stays dust-free  increased reliability and service life Surface optical filter for selection of wavelengths  reduce number of necessary components Pair of resonance reflectors and different component arrangement  reduced size