WF-8 portable laser material evidence discovery instrument is a cost-effective exploration equipment specially designed by Guangzhou Kaifeng Intelligent Technology Co., Ltd. to meet the actual needs of the vast number of front-line combat units, which is used for the search of biological samples and fingerprint on the wall of the crime scene. The equipment uses German imported high-efficiency blue laser as light source, adopts self-developed uniform light technology and heat dissipation system, and has the advantages of compact, portable, monochrome, obvious fluorescence excitation effect and high cost-effective. It is an ideal non-destructive exploration equipment for first-line criminal investigation units.
Scope of application:
(1) For non-destructive testing of various biological traces, such as the search and discovery of seminal spots, vaginal secretions, saliva, blood, urine, skeletal and dental fragments in the scene of the case;
(2) Used for non-destructive direct display of fingerprints on some objects, such as semi-permeable object surface fingerprints, such as the wall of the case-finding site, packaging boxes, etc., and non-destructive search and display of fingerprints on palm prints;
(3) Used for non-destructive testing of sweat fingerprints which have been exposed or fumigated by indene, indene or 502 glue, and fluorescent powder brushing fingerprints.
(4) Used for examining congestion after human injury; bite marks;
(5) Used for inspection of gunshot or explosive residues, search and discovery of suspicious fibers and other substances on the spot.
2. Performance characteristics:
1. Using high-energy laser to stimulate fluorescence of micro-fluorescent substances, the problem of fingerprint forensics on diffuse objects (wall, wood, brick and other carriers, skin surface, etc.) was solved.
2. Solve the problem of extracting old biological trace. It not only has a good effect on fresh fingerprints, but also can enhance the extraction effect by infiltration and precipitation of fingerprints in a certain period of time. It has a special effect on the extraction of old biological traces.
3. To solve the difficult problem of forensic treatment of fingerprints on objects that cannot or are not easily chemically treated. On some special objects, such as art treasures and cultural relics, chemical treatment will destroy their original value, while laser technology can be used for non-destructive extraction.
4. Under laser irradiation, the fibers exhibit high brightness fluorescence response and specificity, which can be used for the discovery and forensics of fibers.
5. It is used for large-area search on the spot to prevent the omission of criminal evidence. It is equipped with a variety of color filters and close-up lenses, which is more convenient for recording.
6. Non-destructive forensics, unreasonable changes in the nature of physical evidence, sweat spots and fingerprints detected and other biological evidence can continue to carry out DNA testing, chemical treatment and other follow-up tests after taking photos.
7. The display rate of laser material evidence system is higher than that of multi-band light source in finding potential fingerprints.
8. Powerful and lightweight: the output power of the host computer is up to 5W, which is the most powerful and lightweight integrated portable laser search and discovery instrument at present.
Technical parameters:
1. Light source type: laser source, blue 445 nm & plusmn; 1 nm;
2. Terminal output power: 5W;
The power of the whole machine is 50W.
3. Optical lens: coated with photosensitive film, with higher transmittance;
4. Uniform lens: Quartz glass convex lens with uniformity of 90%.
5. Power supply mode: integrated lithium battery power supply, spare a group of lithium batteries;
6. Working hours: 1.5 hours of continuous use of one charge;
7. Whole machine weight: 1.0KG battery;
8. Overall size of equipment: total length 33 cm * laser position 5 cm * handle position 5 cm * front lens position 5 cm
4. Full set of packing list:
| Serial number | Name | Specifications | Number |
| 1 | Laser Search Discovery Instrument | wF-8W | 1platform |
| 2 | Laser Protective Specialty Glasses | POLISI | 3Vice- |
| 3 | Charger | DC4.2V，1600mA | 2only |
| 4 | Special color filter kit for photography (including filter kit) | 62mmNikonkakouFilter | 1slice |
| 62mmNikonkakou4XProximity lens | 1slice | ||
| 58mmCanon jackFilter | 1slice | ||
| 58mmCanon jack4XProximity lens |
1slice | ||
| 5 | Lithium battery pack | TRU STF IRELithium battery pack | 2group |
| 6 | Safety box and strap | American Pariken 1495 | 1only |
| 7 | Box Seismic Sponge | EVA | 1individual |
| 8 | An instruction manual |
| 1book |