Abstract: The present invention provides a device and method for skin testing. The device includes a handle assembly connected to a cylinder assembly having a first and second cylinder housing. Each cylinder housing is connected to at least one testing head assembly that includes a plurality of pins having a plurality of tips positionable against the skin and a socket assembly that is structured and operable to pivot the testing head to apply equal and even pressure to all the pins. Further, the method provides positioning the device tangent to the surface of the skin, and pivoting the testing head assembly horizontally to apply equal and even pressure to the pins.

Abstract: The present invention provides a device for skin testing. The device includes a handle assembly connected to a cylinder assembly having two mutually parallel and spaced apart cylinder housings. Each cylinder housing connects to at least one testing head assembly that includes a plurality of pins having a plurality of tips positionable against the skin. Each head assembly has a collar and cooperating tip structured to pivot the testing head on two axes only and still apply even pressure to the pins. Each testing head readily inserts into the collar for usage and ejects promptly from the handle using a trigger mechanism. The cylinder housing construction minimizes accumulation of detritus therein.

Abstract: The present invention provides a device for skin testing. The device includes a handle assembly connected to a cylinder assembly having two mutually parallel and spaced apart cylinder housings. Each cylinder housing connects to at least one testing head assembly that includes a plurality of pins having a plurality of tips positionable against the skin. Each head assembly has a collar and cooperating tip structured to pivot the testing head on two axes only and still apply even pressure to the pins. Each testing head readily inserts into the collar for usage and ejects promptly from the handle using a trigger mechanism. The cylinder housing construction minimizes accumulation of detritus therein.

Abstract: The present invention provides a device and method for skin testing. The device includes a handle assembly connected to a cylinder assembly having a first and second cylinder housing. Each cylinder housing is connected to at least one testing head assembly that includes a plurality of pins having a plurality of tips positionable against the skin and a socket assembly that is structured and operable to pivot the testing head to apply equal and even pressure to all the pins. Further, the method provides positioning the device tangent to the surface of the skin, and pivoting the testing head assembly horizontally to apply equal and even pressure to the pins.

Abstract: A combined optical power and noise meter for measuring both optical power and optical noise includes a detector housing and a photodiode which is disposed in the detector housing. The resistence of the photodiode changes continually in response to the application of optical power thereon. A current to voltage converter applies a bias voltage to the photodiode and transforms an output current therefrom in order to obtain a power voltage which is proportional to the optical power. A first voltage meter is electrically coupled to the current to voltage converter in order to display the power voltage. A noise measuring circuit measures noise in the output voltage of the current to voltage converter and processes the output voltage in order to obtain a noise voltage which is proportional to the optical noise. A divider divides the noise voltage by the power voltage in order to obtain an optical noise to optical power voltage which is proportional to the ratio of optical noise to optical power.

Abstract: An inspection/detection system for use in forensic applications includes a carrying case, a high intensity lamp assembly and a plurality of notch filters. The carrying case has a cover-lid and is a rectangular box with a closed end and an open end to which the cover-lid is hingedly coupled. The high intensity lamp assembly generates light energy of multiple wavelengths within the visible spectrum and infrared spectrum. The high intensity lamp assembly has an output aperture and is mounted within the carrying case. A power supply unit is mounted within the carrying case and energizes the high intensity lamp assembly in order to generate light energy therefrom. An optical connector is optically coupled to the output aperture of the high intensity lamp assembly. A flexible optical fiber cable is optically coupled to the optical connector.

Abstract: A metal vapor laser discharge tube configuration for preventing accumulation of the condensed metal form interfering with the generated laser beam. A heater arrangement is positioned on the tube in an area corresponding to the area in which the metal vapor condenses within the tube. Energization of the heater when required melts the condensate thus extending the laser tube lifetime.

Abstract: An internal mirror metal vapor laser, and in particular, a helium-cadmium laser discharge tube, which is economical, compact and has a relatively long operating and shelf life, the operating life typically exceeding 10,000 hours. A positive column helium-cadmium laser tube of the consumable type and having optical resonator mirrors integral with the tube ends to hermetically seal the tube is provided which includes a relatively large volume cadmium reservoir capable of containing sufficient cadmium for operating life times exceeding ten thousand hours. A heater is applied to the cadmium reservoir for controlling the cadmium vapor pressure. The helium pressure is actively controlled by releasing helium from a high pressure helium reservoir when the helium pressure is less than a predetermined value.

Abstract: The output beam of a laser tube is modulated between a maximum intensity (lase) and minimum (no-lase) intensity levels by varying the laser tube current between corresponding values. The device for controlling the output beam comprises a single transistor provided in the current path of the laser tube, the current therethrough being controlled, or modulated, to provide the modulated laser beam. The device is capable of operating in a plurlity of modes. In the preferred mode, an analog signal is coupled to the transistor control circuitry whereby the laser beam intensity is linearly modulated between the maximum and minimum levels to provide a laser beam having grey scale capabilities. In a second operating mode, a digital signal is coupled to the transistor control circuitry whereby the laser beam intensity is modulated to a constant value between minimum and maximum levels.