| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 372380090 | Having fault protection circuitry | 7 |
| 20100074286 | LASER POWER CONTROL ARRANGEMENTS IN ELECTRO-OPTICAL READERS - Laser power control arrangements interrupt power to a laser used in electro-optical readers upon detection of an over-power condition not conforming to preestablished regulatory standards. In one embodiment, during an operational mode, a difference between laser drive currents at two operating points is compared to a difference between laser drive currents at the same two operating points during a calibration mode. The over-power condition is recognized when the difference during the operational mode exceeds the difference during the calibration mode by a predetermined amount. In another embodiment, the laser is only energized to emit the beam at a reduced power level well below regulatory standards for staring at even if a motor drive failed. | 03-25-2010 |
| 20100232463 | LASER SAFETY SYSTEM - A computer may include a database and a power reducing routine. The database may be configured to store an input power level of an input laser beam transmitted onto and storing power within a gain module. The database may be further configured to store a discharge power level of at least partially discharged stored power discharged from the gain module through an output laser beam. The database may also be configured to store a power safety differential limit. The power reducing routine may include an algorithm. The algorithm may be configured to calculate a power differential by subtracting the discharge power level from the input power level, and to at least one of reduce power to and shut down the input laser beam if the calculated power differential exceeds the power safety differential limit. | 09-16-2010 |
| 20120294325 | LASER SYSTEM WITH SAFETY PROTECTION FUNCTION - A laser system with a safety protection function includes a main body and a detecting unit. The main body includes an object side portion corresponding in position to a target, and a laser-emitting module. The laser-emitting module is for providing a laser beam which is emitted at a position of the object side portion. The detecting unit is disposed at the main body, and includes a light-emitting element and a light-receiving element. The light-emitting element is for providing a light beam which is emitted at the position of the object side portion. The light-receiving element is for receiving the light beam which is reflected toward the object side portion. The laser-emitting module is prevented from emitting the laser beam when the light beam received by the light-receiving element reaches a predetermined luminous flux value. | 11-22-2012 |
| 20130250989 | PROTECTION CIRCUIT FOR PROTECTING LIGHT-EMITTING DIODES OF LASER EMITTER AND PROTECTION METHOD - A protection circuit for protecting light-emitting diodes of a laser emitter is provided. The laser emitter includes a first LED for reading multimedia data stored in a first media and a second LED for reading multimedia data stored in a second media. Cathodes of the first LED and the second LED are grounded, and anodes of the first LED and the second LED are connected with soldering tin. The protection circuit includes a first protection element with a first breakdown voltage and a second protection element with a second breakdown voltage. One end of each of the first protection element and the second protection element is grounded. When the circuit is connected to the laser emitter, residual ends of the first protection element and the second protection element are respectively connected to the anodes of the first LED and the second LED. | 09-26-2013 |
| 20140233595 | Vertical Cavity Surface Emitting Laser With An Integrated Protection Diode - A semiconductor device includes a vertical cavity surface emitting laser (VCSEL) with an integrated protection diode arranged between the VCSEL and an emitting surface. By locating the protection diode above the VCSEL, a minimal increase in substrate area is consumed to protect the VCSEL from electrostatic discharge events. A relatively small capacitance introduced by the protection diode, is controllably adjusted by one of the radial size of the protection diode and the thickness of the intrinsic layer therein. The relatively small capacitance introduced by the protection diode enables the VCSEL to operate at data rates above 10 Gb/s. | 08-21-2014 |
| 20150016482 | QUALITY DETECTION DEVICE FOR LASER SOURCE AND THE QUALITY DETECTION METHOD THEREOF - The disclosure provides a quality detection device for laser source and the quality detection method thereof. The laser source quality detection device comprises: a reflective mirror set located in a range of emitting light from the laser source for receiving light beams from the laser source, and having at least one reflective mirror to reflect the light emitted from the laser source in a profile the same as that of the light emitted from the laser source; and at least one sensor capable of receiving the reflected light out of a predetermined range so as to determine quality of the laser source. | 01-15-2015 |
| 20150092805 | SEMICONDUCTOR LASER DEVICE - A semiconductor laser device includes a semiconductor laser element having an active layer and semiconductor layers on opposite sides of the active layer, and a PN-junction diode in part of the semiconductor layers. The PN-junction diode is connected, in inverse polarity, in parallel with the semiconductor laser element. | 04-02-2015 |
