CN2363169Y - Portable multiwave band light source - Google Patents

Abstract

The utility model relates to a portable multiple waveband light source which is an integrative structure composed of an optical filter rotating disc box, a lamp chamber and a handle. In the utility model, the inner part of the optical filter rotating disc box is provided with an optical filter rotating disc which uses the center of the optical filter rotating disc box as a rotating shaft; the optical filter rotating disc is uniformly provided with a set of interference optical filters with different transparent wavebands along the circumference. The optical filter rotating disc can be poked and rotated by a thumb of a right hand which lifts the handle on an opening position on the edge of the optical filter rotating disc box causing any optical filter to be adjusted on the emergent light path of lamp light for selecting the waveband of the emergent light; a front end opening of the lamp chamber is enclosed with a block of heat absorbing glass for blocking infrared heat radiation; a cylindrical light shading hood is arranged before a light bulb and is used for avoiding the leakage of light from an air inlet and causing cooling gas stream sucked from the air inlet to uniformly cool each component in the lamp chamber according to definite trend; the light bulb used as a light source core and having a reflecting bowl is fixed on the light shading hood by three supporting block; a bottom cover on the terminal of the lamp chamber is provided with a small exhaust fan; the lamp and the exhaust fan are both offered electricity by an external power supply.

Description

The portable multi-band light source

The utility model relates to and is used to reconnoitre the portable light source that vestige is left in the scene of a crime, also relates to be used to observe a kind of special source of leaving over vestige on the material evidence in the forensic science laboratory.

Utilize vestige regular meetings such as residual fingerprint, bloodstain to be produced this characteristic of fluorescence that wavelength is longer than excitation light wave, carry out the common method that crime scene investigation is a kind of forensic science as the fluorescence excitation light source with certain intense light source that can produce the visible light short-wave band by optical excitation.This representative quasi-instrument has that the U.S. executes that Parker (SPEX) company produces executes Parker portable multi-band light source and Bao Li (POLIRAY) hand-held alternative light source.Execute Parker portable multi-band light source and form, link to each other with 2 meters long optical fibre tubes between them, use comparatively inconvenience by heavy 12.5 pounds light-source box and two separative elements of filter wheel box.Precious sharp hand-held alternative light source then needs to change by hand the optical filter that inserts in the light path and changes the emergent light wave band, uses also comparatively inconvenience.

The purpose of this utility model be to provide one multiple functional, compact conformation, easy to use, portable novel portable alternative light source.

The purpose of this utility model is that mode as described below realizes.Whole light source is a portable lamp, and head is a filter wheel box, has one to be the disk (filter wheel) of rotating shaft with the box center in the box, the interferometric filter of the one group of different transmission region of device that are uniformly distributed along the circumference on the disk.Disk can be dialled commentaries on classics with the right hand thumb of hand lamp at disc cassette rim openings place, so that each interferometric filter can be adjusted to respectively on the emitting light path of light, to select the wave band of light source emergent light.Disc cassette is fixed on cylindrical shape lamp house front end, makes the central lines of the circular light export center vertical line and the cylindrical shape lamp house of optical filtering rotating disk box.The lamp house front port is enclosed an antisolar glass, in order to the more near infrared ray of heat content that stops that bulb produces, to avoid the optical filter on the disk overheated.Before light shield placed bulb, its profile was a cylindrical shape, and its external diameter is less than the lamp house internal diameter, and the light shield bottom is the step cutting pattern of a diameter overstriking, and its step external diameter and lamp house internal diameter join.This light shield can block light on the one hand and leak outside from air admission hole, and air-flow is changed over to again in the light shield tube from stopped by light shield after air admission hole enters to be folded to antisolar glass one end, flows through between the reflector of light shield and lamp the space again and discharges through ventilating fan.Make cooling blast dispersion train each parts in lamp house like this, play the effect of Homogeneouslly-radiating.Bulb as the band reflector of light source core is propped up on the annulus of light shield bottom with three back-up blocks, and reflector plays reflective optically focused effect, makes light gather into the outgoing of low-angle light beam.The light bulb base power pin inserts lamp socket, leads to external power supply by the lamp socket lead.On the terminal bottom of lamp house a small-sized ventilating fan is housed, with the shared external power supply of bulb.A strip handgrip further connects into an integral body to optical filter disc cassette and lamp house.According to the above, owing to realized the integrated of filter wheel box and lamp house; Because integrally-built compactedness and uniqueness reduce the light source volume weight significantly, and realize the one-handed performance in the use, obviously improved the portability and the operation convenience of whole light source.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structural representation of the present utility model.

Label 1 expression filter wheel box among Fig. 1,2 expression filter wheels, 3 expression air admission holes, 4 expression handgrips, 5 expression lamp houses, 6 expression light exits, 7 expression antisolar glasss, 8 expression light shields, 9 expression back-up blocks, 10 indication lamps, 11 expression lamp sockets, 12 expression cooling fans.

Contrast Fig. 1, whole light source is combined by filter wheel box 1 and lamp house 5.1 filter wheel 2 is arranged in the filter wheel box.Uniform a plurality of optical filters on the filter wheel can be dialled with finger and change so that any optical filter places light exit 6.Lamp house 2 is one columnar structured, and an antisolar glass 7 is housed in the front end face light path, and light shield 8, lamp 9 and lamp socket 10 are equipped with in the lamp house middle part.On the lamp house shell at light shield position, have air admission hole 3.The light shield bottom stage is then connected airtight with lamp house.Lamp 10 is fixed on the light shield by 3 back-up blocks 9 that are distributed on the light shield.11 footing that directly insert lamp 2 of lamp socket.Cooling fan 12 is equipped with in the lamp house bottom, further filter wheel box 1 and lamp house 2 is combined into integral body by handgrip 4.

Claims (3)

1, a kind of portable multi-band light source, it is by filter wheel box and lamp house two part be combined intos.It is characterized in that: the integral body that filter wheel box and lamp house are combined closely and formed, a rotating disk that a plurality of optical filters are housed is arranged in the discoidal filter wheel box, this round turntable can be dialled commentaries on classics with hand from rotating disk box opening part, is adjusted in the light path of light outgoing in the lamp house thereby dish can be gone up any one optical filter.The cylindrical tube of lamp house, front end are equipped with a slice antisolar glass, and inside is equipped with a light shield and is had the bulb of optically focused reflector, and a cooling ventilating fan then is equipped with in the rear end.

2, alternative light source as claimed in claim 1 is characterized in that described optical filter is an interferometric filter.

3, alternative light source as claimed in claim 1 it is characterized in that described light shield be a part of external diameter less than the lamp house internal diameter, a part of external diameter equals the hollow cylindrical body of lamp house internal diameter.