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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 8077750 | Optical transmitting module and optical transmitting device An optical transmitting module of a coaxial type is provided in which a disturbance in a waveform of light which is output from a semiconductor laser element due to a signal which is output from an optical modulator unit can be suppressed. The optical transmitting m... | 12/13/2011 |
| 7869479 | Optical module An optical module includes a stem; a first lead pin and a second lead pin for receiving differential signals, the first and second lead pins penetrating the stem; a mount block fixed to the stem; a laser diode having a pair of electrodes; a submount mounted on the m... | 01/11/2011 |
| 7801193 | Laser diode module with an adjustable monitoring current A laser diode module with an adjustable monitoring current, wherein the photo diodes monitoring the light-emitting power of the laser diode are arranged in array, and wherein a programmed photo diode is formed by the photo diodes in match of a memory and switch cont... | 09/21/2010 |
| 7796659 | Pickup head circuits Pickup head circuits with a protection circuit capable of preventing unexpected large current flowing through a laser diode during power-on interval. A driving transistor is coupled between a laser diode and a first power voltage, an automatic laser power control (A... | 09/14/2010 |
| 7664150 | Diode laser electrical isolation system A system is provided that electrically isolates a diode laser when the health of the diode laser deteriorates past a preset value. In addition to the diode laser and its power supply, the system includes a monitoring system that monitors the voltage across the diode... | 02/16/2010 |
| 7564882 | Integrated circuit having on-chip laser burn-in circuit An integrated circuit for providing burn-in current to a laser diode. The integrated circuit includes a laser driver having an output for connection to the laser diode. Burn-in circuitry is formed on the integrated circuit and generates a burn-in current. A switch i... | 07/21/2009 |
| 7512165 | Photoelectric conversion module and optical transceiver using the same A photoelectric conversion module has an optical element to transmit/receive optical signals, a stem to fix the optical element, a cap to cover the optical element, and a plurality of leads to impose electric signals to the optical element or to transmit electric si... | 03/31/2009 |
| 7512166 | Apparatus and method for controlling optical power and extinction ratio The present invention relates to an optical power and extinction ratio controlling device and method. An optical signal output from a light source is detected and optical power and extinction ratio of the light source are controlled. In detail, a feedback signal is ... | 03/31/2009 |
| 7505498 | Apparatus and method for measurement for dynamic laser signals A system contains a laser output measurement circuit used in a laser control system (210). The circuits contain a photodiode sensor (109), sample and hold amplifier (202), IC with synchronizer and delay circuits (206), and an analog to di... | 03/17/2009 |
| 7499479 | Laser diode driver circuit and optical communication device A laser diode driver circuit includes: a current source for generating a laser drive current which drives a laser diode; a switch for switching the passage/non-passage of the laser drive current into the laser diode; an APC circuit for controlling the magnitude of t... | 03/03/2009 |
| 7483460 | Transmitter optical subassembly and a transmitter optical module installing the same To provide a transmitter optical subassembly that provides an enhanced high-frequency response without increasing the power consumption within a CAN-type package. The transmitter optical subassembly includes a semiconductor laser diode, an auxiliary circuit, and a p... | 01/27/2009 |
| 7457337 | Optical module having case grounding using bypass capacitor According to embodiments of the present invention, an optical transponder includes a transmitter optical subassembly (TOSA). In one embodiment, the electrical ground of the TOSA may be DC-isolated from chassis ground of the transponder using a blocking capacitor tha... | 11/25/2008 |
| 7443896 | Optical midpoint power control and extinction ratio control of a semiconductor laser The present invention provides a method and apparatus, such as an integrated circuit, to control the optical midpoint power level and the extinction ratio of a semiconductor laser and maintain the optical midpoint power level and the extinction ratio substantially c... | 10/28/2008 |
| 7436869 | Laser circuit substrate This invention makes it possible to meet a requirement of high-quality image printing and high-speed driving of a semiconductor laser driver in a laser beam printer or the like while suppressing radiant noise. A laser circuit substrate includes a first wiring patter... | 10/14/2008 |
| 7426226 | Drive circuit and drive method for semiconductor light source A circuit for driving a semiconductor laser including a semiconductor integrated circuit, which controls the drive of the semiconductor laser, and is connected to one end of the semiconductor laser. Moreover, the driving circuit incorporates a first power source +Vc... | 09/16/2008 |
| 7411986 | Optical system laser driver with a built in output inductor for improved frequency response A laser driver comprises a PNP transistor current source, an inductor coupled to the PNP transistor current source, a switch coupled to the inductor, and a current sink coupled to the switch. The PNP transistor current source supplies a first current to a laser if t... | 08/12/2008 |
| 7400662 | Calibration of laser systems A method for determining a condition of the laser system includes determining a change in a laser current from an initial value. A method for measuring a laser current includes determining a difference between the values of a power supply current, which is the value... | 07/15/2008 |
| RE40343 | Control circuit with automatic DC offset An automatic gain control circuit in the feedback path for a laser wavelength control circuit is described herein. This gain control circuit automatically adjusts the amplification of the analog signals output from a photodetector array, where the array detects a fr... | 05/27/2008 |
| 7372056 | LPP EUV plasma source material target delivery system An EUV light generation system and method is disclosed that may comprise a droplet generator producing plasma source material target droplets traveling toward the vicinity of a plasma source material target irradiation site; a drive laser; a drive laser focusing opt... | 05/13/2008 |
| 7369597 | Laser output light pulse stretcher Providing a high peak power short pulse duration gas discharge laser output pulse comprises a pulse stretcher a laser output pulse optical delay initiating optic diverting a portion of the output laser pulse into an optical delay having an optical delay path and com... | 05/06/2008 |
| 7369591 | System for controlling peaking for a driver for a vertical-cavity surface-emitting laser A driver for a vertical-cavity surface emitting laser (VCSEL) is provided that includes a bias current source, a modulation source, and a peaking control circuit. The bias current source is operable to generate a bias current for the VCSEL and an output voltage. The... | 05/06/2008 |
| 7369268 | Light source using large area LEDs A printing apparatus (100) for printing digital images onto a photosensitive medium (140) employing, for exposure energy, a light source (20) that uses various arrays of LEDs (32). The printing apparatus (100) may form the print im... | 05/06/2008 |
| 7366215 | Optical module An optical module includes a stem; a first lead pin and a second lead pin for receiving differential signals, the first and second lead pins penetrating the stem; a mount block fixed to the stem; a laser diode having a pair of electrodes; a submount mounted on the m... | 04/29/2008 |
| 7365349 | EUV light source collector lifetime improvements An apparatus and method for cleaning a plasma source material compound from a plasma produced EUV light source collector optic which may comprise reacting the plasma source material compound with hydrogen to form a hydride of the plasma source material from the plas... | 04/29/2008 |
| 7366214 | Diode-pumped solid-state laser with self-maintained multi-dimensional optimization A diode-pumped solid-state laser (DPSSL) has self-maintained multi-dimensional optimization. The output property of the DPSSL, including optical power, noise level, and the operation conditions of its individual components, including the drive current and temperatur... | 04/29/2008 |
| 7359136 | TMR/GMR amplifier with input current compensation An amplifier system with feedback current cancellation comprises an amplifier, a feedback network, first and second unity-gain buffers, a second resistance, and a current mirror. The amplifier includes an input, an output, and at least one stage. The feedback networ... | 04/15/2008 |
| 7359649 | Infrared transmitter circuit and electronic device An infrared transmitter circuit causes an output current to flow to a light emission diode via a current mirror circuit constituted of three transistors by using a current supplied from a power source circuit, so that the light emission diode emits light. When a vol... | 04/15/2008 |
| 7355191 | Systems and methods for cleaning a chamber window of an EUV light source Systems and methods are disclosed for cleaning a chamber window of an extreme ultraviolet (EUV) light source. The window may have an inside surface facing a chamber interior and an opposed outside surface and the light source may generate debris by plasma formation.... | 04/08/2008 |
| 7345803 | Optical modulator and optical modulating method In an optical modulation device (10) having an electrical/optical interaction region (11), an electrical signal line (3) is connected to an electrical signal input terminal (2a), another electrical signal line (4a) is... | 03/18/2008 |
| 7346088 | Voltage dividing apparatus for preventing sudden increases in power to a laser diode A voltage dividing apparatus for preventing sudden increases in power to a laser diode includes a laser diode module, a laser-driving unit and a Zener diode. The laser diode module includes a laser diode for receiving a driving current to emit light, and a photo dio... | 03/18/2008 |
| 7329251 | Laser treatment apparatus A laser treatment apparatus for performing treatment by irradiating an affected part with a laser beam comprises: a laser source capable of emitting beams of a plurality of different wavelengths; a first setting unit which sets an irradiation amount of a laser beam ... | 02/12/2008 |
| 7324572 | Laser driver circuit for burst mode transmission and fabrication method thereof A method for making a laser driver circuit for burst mode is described. The method includes the following steps: First, a continuous mode laser driver circuit is selected, the chip having a temperature compensation output, a bias current setting input, and a referen... | 01/29/2008 |
| 7321607 | External optics and chamber support system A gas discharge laser and method of operating same is disclosed which may comprise a gas discharge laser chamber support structure comprising a first support arm attached to a mounting table; a gas discharge laser chamber slideably engaging the first support arm; an... | 01/22/2008 |
| 7321606 | Laser trim and compensation methodology for passively aligning optical transmitter A method includes a scheme for trimming and compensation for a laser emitter in a fiber optic link. Data models of laser performance are provided and used to determine a base power level. It is then confirmed that the base power level is satisfactory. If necessary, ... | 01/22/2008 |
| 7317536 | Spectral bandwidth metrology for high repetition rate gas discharge lasers A bandwidth meter apparatus and method for measuring the bandwidth of a spectrum of light emitted from a laser input to the bandwidth meter which may comprise an optical bandwidth monitor providing a first output representative of a first parameter which is indicati... | 01/08/2008 |
| 7317179 | Systems and methods to shape laser light as a homogeneous line beam for interaction with a film deposited on a substrate Systems and methods are disclosed for shaping and homogenizing a laser beam for interaction with a film. The shaping and homogenizing system may include a lens array and a lens that is positioned to receive laser light from the lens array and produce a respective el... | 01/08/2008 |
| 7317744 | Optical head apparatus A laser driver is configured so as to disperse into a main circuit which generates a control signal to drive first and second semiconductor lasers, and first and second sub circuits having first and second final driving stages which drive, in accordance with the con... | 01/08/2008 |
| 7315558 | Disable/enable control for laser driver eye safety A circuit for disabling an energy-generating component. The circuit comprises an input operable to receive a disable signal and a disable circuit operable to disable the component in response to the disable signal for a predetermined duration of time sufficient to m... | 01/01/2008 |
| 7308010 | Laser drive device and image forming apparatus incorporating the same An inexpensive laser drive device which is capable of driving a laser for emission of an appropriate amount of light. Electric currents supplied from a supply current control device formed in an integrated circuit to a plurality of predetermined ports of the integra... | 12/11/2007 |
| 7301976 | Method and apparatus for semiconductor laser driving capable of stably generating consistent optical pulse widths of laser diodes A semiconductor laser driving circuit includes a light amount detector, a frequency determiner, and an initialization circuit. The light amount detector detects an amount of light emitted by a laser diode, and outputs a first voltage corresponding to the amount of l... | 11/27/2007 |
