Operation of this kind of laser pointer is very easy and convenient

Then the helium ion laser beam, so that the blood on the fluorescence intensity significantly improved, and can even filter the naked eye. Fiber carpet, red paint on the floor, and black cotton carrier in this way a success. Surprisingly, yes, that is, washed with soapy water, can still inspire a satisfactory fluorescent latent image, so that the blood on show. Similarly, this approach also achieved good results in the past were unable to extract the fingerprint. This, undoubtedly, the public security personnel to provide effective means of a sanction offenders. Chicago, a judge accused of corruption, the court ordered it to hand over financial records, he puts the information burned.  green laser pointer    has the mid open design.
However, he did not escape the punishment of the law, the original laser technology was of great help, the U.S. Internal Revenue Service has a scientific visa laboratory, specializing in the approach to deal with financial crime. One of them is in the gray trace burnt files to identify the text. The process is this: experts to use a special tool, and piles of burning parchment layers separate folder in the glass. Then, by Zhang, ultraviolet or infrared laser irradiation, the original writing will be revealed. Revealed at the same time, uses a video camera filmed, you can become the most powerful legal evidence. It is reported that laser technology can distinguish between 60 different ink handwriting. Of course, the burning parchment too broken or too incomplete, in any case not be able to extract available to identify the handwriting. The use and operation of this kind of   laser pointer   is very easy and convenient.
Playing the guitar light measuring electrical measurements, mostly using light - electricity conversion principle, the current ratio to measure the intensity of the light. We are most familiar will automatically aperture (EA) camera, the camera lens or lens coaxial direction of the site, install a photosensitive element (such as silicon photocell or photoresistor). The photosensitive element according to the light strength of change of current, voltage or resistance. The use of the variable characteristics of the modulation current, you can control the aperture changes. Previous professional photographers in the field shooting, and often carry a light meter, this meter is the use of silicon photovoltaic cells based on light changes and the output current to drive the deflection of the pointer for the user data. The other is the 200mW star green laser    .
Not the other way around with the beam measuring voltage or current? This common sense is impossible. Japan Science and Technology, University Faculty of Ono Research ingenuity, actually developed the use of laser direct measurement of the voltage sensor and refreshing. The sensors measured electric light, this can "is the use of crystal the original pockels effect. The dielectric constant of the crystal used in the experiments, the high withstand voltage. The use of fiber optic transmission laser sensor, and up to several meters in length, to be reliable insulation between the high pressure region and the human body, compared with the general resistance of high-voltage step-down test bar, seems the volume is very light, but also gives a sense of security. Technology, the key is to take measures to prevent the occurrence of discharge along the crystal surface. This green laser pointer has an extra laser head.
Because in the high-pressure measurements, the discharge will become the most serious problem. One strategy is the sensor filled with grease, in order to eliminate the gap. The same time, the structure of the sensor, carefully designed, the input impedance of the crystal is extremely small, but also increased the pressure of the crystal. This sensor to directly measure the voltage of 100 V to 35 kV voltage is applied in the experiment had to 36 kV, more than the standard of electrical safety testing. Because in the line, there will always be lightning and other surge voltage caused by impact. Ono Research is to take measures to further improve the pressure resistance of the sensor. Ono Research, the U.S. company 3M and the National Institute of Technology. The manufacturer can produce   led flash light   for the customer.