BTKF-III 7-waveband LED wide light exit footprint search light source

Purpose

A. Illuminate the dust footprint with natural white light

The footprint lamp outputs natural light. When the light is output at an angle close to the ground, the smooth ground reflects the incident light directionally, and dust reflects the incident light diffusely. Observe the ground in a direction deflected from the mirror reflection direction of the ground, then the strong contrast between the dark ground and the bright dust footprint can be seen.

B. Illuminate the dust footprint with polarized light

Insert the polaroid into the jack above the footprint lamp, which then outputs polarized light. The polarization direction of the polarized light is perpendicular to the ground. The intensity of the internally reflected light of the ground is greatly reduced, which significantly improves the contrast of the dust footprint.

C. Illuminate the dust footprint with red, orange, yellow, green and blue light

If the background of the dust footprint is multi-colored, insert barrier filters of red, orange, yellow, green and blue into the jack above the footprint lamp, which then outputs red, orange, yellow, green and blue light. Under different colors of light, the footprint will show different contrast, choose an ideal contrast for photography.

Content

Structural features

The footprint lamp is flat and square. The light emitted by the linearly arranged LED lamp beads at the front passes through the semi-cylindrical lens and becomes a flat light beam. There is a long opening above the front of the semi-cylindrical lens. Through this opening, polaroid can be inserted in front of the lens to output polarized light; or, barrier filters can be inserted to output light of different colors.

Technical parameter

Features

A. The footprint lamp outputs flat light that is projected on the wall to form a light spot, which has two features: 1. the spot width is small (110cm wide at a distance of 100mm); 2. the edge of the spot is neat.

B. If the light spot is too wide or the edge of the spot is irregular, the ground-reflected light will produce a lot of stray light. The mixing of the stray light and the diffuse reflection light of the dust will seriously weaken the contrast between the dust and the ground.

C. If the light spot's width is small and the edge of the spot is neat, the ground-reflected light mainly concentrates in the direction of mirror reflection, and little stray light with uncertain direction is formed, so the contrast between dust and the ground is very strong.

Working principle

The footprint lamp outputs high-intensity flat light. When the light is output at an angle close to the ground, the smooth ground reflects the incident light directionally, and dust reflects the incident light diffusely. Observe the ground in a direction deflected from the mirror reflection direction of the ground, then the strong contrast between the dark ground and the bright dust footprint can be seen.

Instructions

A. Place the footprint lamp 50cm from the dust footprint and turn on the switch. The footprint lamp outputs flat light to illuminate the footprint on the ground. Along the direction of the light, try to reduce the height of the eye to observe the ground, and a good contrast of the footprint can be seen.

B. Against the direction of the light, try to reduce the height of the eye to observe the ground, and a good contrast of the footprint can be seen at a height just avoiding the reflection spot.

C. Adjust the lamp-footprint distance and the elevation angle of the light outlet until a footprint with ideal contrast is seen.

D. Turn the switch to adjust the brightness.

E. Insert the polaroid into the long opening above the front of the footprint lamp and observe the contrast of the footprint.

F. Insert red, orange, yellow, green and blue barrier filters into the long opening above the front of the footprint lamp and observe the contrast of the footprint.

Along the direction of the light, try to reduce the height of the eye to observe the ground, and a good contrast of the footprint can be seen

Against the direction of the light, try to reduce the height of the eye to observe the ground, and a good contrast of the footprint can be seen

Dust footprints lifted by lifting film under white light

Installing the barrier filter

Red barrier filter

Orange barrier filter

Yellow barrier filter

Green barrier filter

Blue barrier filter

Polarizer

Illuminate the dust footprint on the surface of synthetic leather with natural white light

Illuminate the dust footprint on the surface of synthetic leather with polarized light

Illuminate the dust footprint on the surface of leather with natural white light

Illuminate the dust footprint on the surface of leather with polarized light

Illuminate the dust footprint on the surface of paint wood with natural white light

Illuminate the dust footprint on the surface of paint wood with polarized light

Product Application

Application areas for our products include crime scene investigation, fingerprint collection and development, footprint collection and development, tool marks collection, trace evidence collection, documents examination, forensic medical examination, forensic evidence collection, DNA collection, DNA disinfection, criminal photography, criminal investigation light source, narcotic drugs test, poison test, evidence packaging, evidence marking, crime scene plotting, crime scene protection, human body protection on crime scene.

Our Service

We can provide reliable product and service for you.

1. Q: Is it a reliable company?

A: Beijing Bulant Police Equipment Co.,Ltd. is a company specialized in forensic product, such as: crime scene investigation, trace detection, fingerprint development and extraction, footprint extraction, micro-evidence extraction, files & documents inspection, gunshots detection, forensic examine, DNA extraction, criminal photograph, forensic light source, alcohol test, traffic scene investigation, drug & poison examine, evidence packaging, consumables in lab, etc.

2. Q: What about the delivery?

A: We can offer the door to door services by air or by sea just depend on your actual request. Such as DHL, UPS, TNT, FEDEX…

3. Q: What is the package?

A: Aluminum alloy case/carton case/wooden case.

4. Q: Do you have any timely technology supports?

A: We have a professional technology supporting team for your timely services. We prepare the technical documents for you, also you can contact us by telephone, webcam, online chat (google talk, MSN, skype, yahoo).

5. Q: What is the payment method?

A: T/T, WESTERN UNION, MONEY GRAM, ESCROW, PAYPAL

6. Q: Do you take part in the world exhibition every year?

A: Yes, we took part in exhibitions every year since 2008.