| 摘要 |
<p>A laser pointer enabling continuation of, e.g., a presentation by quickly dealing with a failure that a laser beam is suddenly not emitted during the presentation because of power supply function stop. The laser pointer for pointing an arbitrary position by emitting a laser beam from an emitting part (1) is characterized by comprising a power supply (3) having electrical double layer capacitors (3a, 3b) and a connection section (4) for connection to an external electronic device or a power supply. The laser pointer can also comprise a discharging circuit (9) for discharging the excessive charge of the power supply (3). The connection section (4) can be composed of a USB (Universal Serial Bus) terminal. The laser pointer does not cause an accident that a person receives the laser beam at the eye by mistake.</p> |
