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Multifunctional Field Investigation Lamp (50W Polarization)

  • No:sx-hw50
  • Quantity:
    technical parameter
    Lighting types: DC12V, 50W, OSRAM halogen lamp; Lighting color temperature: 3000K; Lighting life: 1000 hours
    Product configuration
    Lamp body 1 battery 1 charger 1 transformer 1
    Red filter, orange filter, yellow filter, green filter, blue filter and blue filter
    55 Polarizer 1 55-49 Circle, 1 55-58 Circle and 1 Circle
    49 Polarizer 1 55-62 Circle 1
    Battery Connector 1 Aluminum Alloy Box 1
    Product function:
    1. Ordinary lighting can output very uniform beam, adjust the focal length of the lens can adjust the spot, the lamp body is equipped with a special triangular frame interface, can fix the position of the lamp body, especially suitable for finding and photographing potential fingerprints and other subtle traces.
    2. The reflectivity of light of different colours varies with the material that forms the trace and the background of the colour separation test and the colour separation photography. The reflectivity of the two substances to white light differs slightly, but to a certain color light the reflectivity may differ greatly, so that the contrast of trace evidence under color light is stronger than that under white light. For example, the contrast of light-blooded fingerprints on a blue background is very small under white light. When illuminated with blue light, the fingerprint lines will be black, the color will become darker, and the background will become bright; when illuminated with red light, the opposite will happen. Both color illumination can enhance contrast. The light can output five colors of red, orange, yellow, green, blue and so on. The trace evidence can be illuminated by the output light of different colors, and the contrast effect different from white light can be observed.
    3. To stimulate fluorescence, fluorescent fingerprint powder is used to brush potential fingerprints, and then the blue light from the lamp is used to illuminate the fingerprints. Direct observation shows that the fingerprint lines emit strong fluorescence. If you wear orange glasses to observe, the effect is better.
    4. Polarization light is used to suppress the bright spot on the surface of the object. The polarizer is attached to the light output port. The potential fingerprints are obliquely illuminated by the beam, and the fingerprints are observed in the direction of reflected light. If the flare is dazzling and the observation effect is affected, the polarizer can be rotated to change the polarization direction. In a certain polarization direction, the brightness of the flare will be significantly reduced, so that the fingerprint lines can be clearly visible. In front of the camera lens, a polarizer is added to make the camera lens point at the fingerprint in the direction of reflected light, and the fingerprint is observed through the viewfinder. If the flare is bright and the observation effect is affected, the polarizer can be rotated and the polarization direction can be changed. In a certain polarization direction, the brightness of the light spot will be obviously weakened and the fingerprint line will be clear. Clearly visible. Conversion coil can connect 55mm polarizer to various aperture camera lens.
    5. The mode of power supply can be connected with AC by battery or transformer.
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