The light intensity is adjustable. With the development of optics and imaging technology, the 'biological sample discovery instrument' with criminal technology light sources with specific output bands as the main body has demonstrated the advantages of easy-to-use, fast and optical non-destructive inspection in the search and discovery process of biological samples. Favored by the criminal technology forensic and DNA departments.) for DNA testing. It is equipped with a manufacturer's special filter eye mask, which can pass the fast and non-destructive optical inspection method on the surface of clothing and other objects Look for biological samples (such as blood stains, fluid spots, hair, tissues, bone fragments, etc.
The infrared light wavelength of bite lab disposable products marks is 800-900 nanometers, and the peak wavelength is 860 nanometers., as well as blood stains on a light-colored or fluorescent guest background. The blue light wavelength is 420-470 nanometers, the peak wavelength is 445 nanometers, and the GG495 high-pass cut-off filter is used for fluorescence inspection. Such as body fluids (sperm spots, urine spots, saliva spots, secretions), bone/teeth fragments, hair, fibers, etc. -In conjunction with the camera, it is mainly used for the detection of subcutaneous congestion, bite marks and morphological observation of human tissues. It is mainly used for routine search of large-area inspection materials, such as hair, fibers and dander on bed sheets and clothes. The most representative of these is the Collet ML2 series of desktop bio-inspector discovery instruments manufactured by Foster+Freeman.
The light source of Klein ML2 series desktop bio-inspector discovery instrument is typically used for white light wavelength 400-700 nanometers, and the color temperature is 5500K. It is mainly used for the detection of blood stains on dark object backgrounds (blood stains absorb infrared light and darken background reflection infrared light), especially for dark fabrics The blood stains on the top are the best, such as blood stains on dark cotton clothes, sweaters, and jeans.
At the same time, it can be equipped with blue color filter for color separation observation to improve the contrast between physical evidence and background, such as blood stain observation under light background. Saliva spot long-wave ultraviolet wavelength 350-380 nanometers, peak wavelength 365 nanometers-with GG420 filter for ultraviolet photoluminescence inspection, such as fibers, certain chemical residues, etc. Blood stains on dark denim hide blood stains under paint.
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