CN1153318A - Flasher capable of varying light distribution angle - Google Patents
Flasher capable of varying light distribution angle Download PDFInfo
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- CN1153318A CN1153318A CN 96120379 CN96120379A CN1153318A CN 1153318 A CN1153318 A CN 1153318A CN 96120379 CN96120379 CN 96120379 CN 96120379 A CN96120379 A CN 96120379A CN 1153318 A CN1153318 A CN 1153318A
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Abstract
The invention discloses an angle adjustable light distribution flash device which can change the light distribution angle. The invention is characterized in that: the reflecting mirror consists of a fixed reflecting mirror which keep the light distribution angle of the reflecting light unchanged when the reflecting light is projected to one side of the photographed object, a movable reflecting mirror which can adjust the light distribution angle of the reflecting light, and a driving mechanism which continually drive the movable reflecting mirror along with the change of the photography flare angle. Because the structure of the light distribution angle is changed by mechanically moving the reflecting mirror, the light distribution angle of the projecting light can be adjusted with a low-price and simple structure to improve the efficiency.
Description
The invention relates to the flasher capable of varying light distribution angle that can change the luminous intensity distribution angle, further is the invention with the flasher capable of varying light distribution angle that uses in the camera of zoom shot camera lens.
Up to now, existing various cameras with zoom lens, for example, the camera of adjustable focal length between close-up photography, standard are photographed and looked in the distance and photograph, the camera of adjustable focal length between wide-angle photography, standard are photographed and looked in the distance and photograph, the camera of adjustable focal length between standard is photographed and looked in the distance and photographs, all kinds such as the camera of adjustable focal length and high definition camera lens, interchangeable lenses camera between wide-angle photography and the standard photography.
In above-mentioned various cameras with zoom lens, the photography subtended angle changes with focal length variations.When using this camera, hope can be furnished with the adjustable flasher in luminous intensity distribution angle, effectively to utilize its luminous power.In the adjustable flasher in this luminous intensity distribution angle, the angular range of flash of light (being luminous intensity distribution angle or illumination angle) can be corresponding to focal length variations (or photography subtended angle change) and continuously or the piecewise change.
In the adjustable flasher in this luminous intensity distribution angle, be provided with such as being configured in before the camera body and having the collector lens (as Fresnel lens) of positive amplification ratio.The back of this collector lens is provided with the luminescence unit of being made up of luminotron and catoptron (reflecting umbrella).The variation interlock of the axial distance of above-mentioned luminescence unit and collector lens and photography subtended angle.That is, in this flasher, during large angle, above-mentioned axial distance diminishes, and during longshot, above-mentioned axial distance increases, and can adjust the luminous intensity distribution angle of flasher thus.
In the adjustable flasher in above-mentioned luminous intensity distribution angle, the illumination angle of luminescence unit is fixed, thus when the axial distance of luminescence unit and collector lens hour, it launches light, the overwhelming majority is injected in the condenser, thereby projected on the subject.But when above-mentioned axial distance was big, the incident angle of above-mentioned collector lens diminished, and the outer emission light of this angular range can not project on the collector lens, so there is the problem that effectively to utilize its luminous power.
The adjustable flasher in a kind of luminous intensity distribution angle has been proposed in the Te Kaiping 6-123911 communique, in this device, with luminotron and catoptron as one, above-mentioned catoptron the place ahead has fixedly installed the lens (positive lens) with positive amplification ratio in its luminescence unit, and this luminescence unit the place ahead has disposed the lens (negative lens) with negative magnification.In said apparatus, variation (or variation of the camera defocus distance) interlock of axial distance between luminescence unit and the negative lens and photography subtended angle is realized the adjustment at luminous intensity distribution angle thus.
In the adjustable flasher in above-mentioned luminous intensity distribution angle,, must strictly determine the refractive index of the negative lens of the positive lens in the luminescence unit and the face body internal fixation of taking pictures, the optical characteristics such as curvature of each lens face in order to obtain desired luminous intensity distribution angle adjustment amount.In addition, also must adjust axial distance between luminescence unit and the negative lens accurately.Like this, the cost of above-mentioned flasher capable of varying light distribution angle will increase.
Make positive lens and negative lens with the optics glass, can obtain the good optical characteristic.But its cost is also strengthened.And lower, but be difficult to obtain correct light distribution characteristic owing to producing striped in the lens by the Fresnel positive lens and the negative lens cost of plastic production.
The present invention is conceived to address the above problem, and its primary and foremost purpose is not that the accurate travel mechanism that uses high performance lens and can do accurately to move is provided, but simple in structure and cheap flasher capable of varying light distribution angle will be provided.Furtherly, the purpose of this invention is to provide a kind of camera, its luminous intensity distribution angle and zoom lens focal length interlock that is used for having zoom lens changes and flasher capable of varying light distribution angle simple in structure.
In order to solve above-mentioned problem, the present invention takes following technical scheme:
A kind of flasher capable of varying light distribution angle, it has can be with the catoptron of light reflection back projection on subject one side direction of stroboscopic light sources emission, and can adjust the luminous intensity distribution angle of projection light on above-mentioned subject one side direction, it is characterized in that: above-mentioned catoptron has for adjusting the structure that can move in above-mentioned luminous intensity distribution angle.
A kind of flasher capable of varying light distribution angle, it has and can it is characterized in that with the light reflection back projection of stroboscopic light sources emission to the catoptron of subject one side direction and can adjust the luminous intensity distribution angle of projection light on subject one side direction:
Above-mentioned catoptron is made up of variable moving reflector in stationary mirror, reflected light luminous intensity distribution angle that the reflected light projection reflected light luminous intensity distribution angle on above-mentioned subject one side direction is constant and the driving mechanism that drives above-mentioned moving reflector.
A kind of flasher capable of varying light distribution angle, its variable camera of subtended angle that is used to photograph, it has light reflection back projection that stroboscopic light sources is sent, and interlock changes with the variation of above-mentioned photography subtended angle to the reflected light luminous intensity distribution angle of subject to the catoptron of subject one side direction and above-mentioned projection, it is characterized in that:
Interlock drives the driving mechanism of above-mentioned moving reflector and forms above-mentioned catoptron by the stationary mirror that the reflected light projection reflected light luminous intensity distribution angle on above-mentioned subject one side direction is constant, moving reflector that reflected light luminous intensity distribution angle is adjustable with the variation of above-mentioned photography subtended angle.
A kind of flasher capable of varying light distribution angle, it is used to have the camera of zoom lens, it has the light that stroboscopic light sources is sent and reflects the catoptron of back projection to subject one side direction, and above-mentioned projection changes with above-mentioned zoom lens focal length and interlock changes to the reflected light luminous intensity distribution angle of subject, it is characterized in that:
Above-mentioned catoptron changes and interlock drives the driving mechanism of above-mentioned moving reflector and forms by the stationary mirror that the reflected light projection reflected light luminous intensity distribution angle on above-mentioned subject one side direction is constant, moving reflector that this reflected light luminous intensity distribution angle is adjustable with above-mentioned zoom lens focal length.
Described flasher capable of varying light distribution angle, it is characterized in that: above-mentioned stroboscopic light sources is slightly cylindrical strobo, the said fixing catoptron has the light reflection that above-mentioned strobo is sent after the opening of the place ahead formation throws the structure on subject one side direction, and above-mentioned moving reflector is made up of the upper and lower reflecting plate that last the place ahead that is configured in above-mentioned opening respectively and inferoanterior also can receive a part of light of opening ejaculation.
Described flasher capable of varying light distribution angle is characterized in that: above-mentioned moving reflector changes with above-mentioned focal length and interlock changes its position, this change in location can be continuous, also can be stage.
Described flasher capable of varying light distribution angle, it is characterized in that: above-mentioned upper and lower reflecting plate is supported by the axle away from above-mentioned opening one side, when above-mentioned focal length is nearer, this the upper and lower reflecting plate that is driven by interlock near opening one side towards mutually away from the direction swing, when above-mentioned focal length was far away, close opening one side of this upper and lower reflecting plate that is driven by interlock was swung towards mutual approaching direction.
The flasher capable of varying light distribution angle of recording and narrating, it is characterized in that: the reflecting surface of above-mentioned upper and lower reflecting plate and stationary mirror roughly all is parabola shaped.
The flasher capable of varying light distribution angle of recording and narrating, it is characterized in that: when above-mentioned focal length was far away, the reflecting surface of above-mentioned upper and lower reflecting plate was continuous variable condition setting with the parabola shaped reflecting surface of said fixing catoptron along above-mentioned peristome prolongation respectively substantially.
A kind of flasher capable of varying light distribution angle, it can be used for having in the camera of zoom lens and flash of light projection light luminous intensity distribution angle can be adjusted, and it is characterized in that: have: the strobo that roughly is cylindrical outer shape;
The light that this strobo is sent reflects after the fixation reflex umbrella of opening projection on subject one side direction that the place ahead forms; With
Be configured in the last the place ahead and the inferoanterior upper and lower reflecting plate of above-mentioned opening respectively; This upper and lower reflecting plate receives a part of light of penetrating through above-mentioned opening and can change and interlock is made wallowing motion to change the direction of subject one side flash of light light beam with above-mentioned phtographic lens focal length.
Described flasher is characterized in that:
Upper and lower reflection board structure is for when the phtographic lens focal length is nearer, its part near place, fixation reflex umbrella opening top is driven on the direction of leaving mutually opens, and when this phtographic lens focal length is far away, above-mentioned part is driven on the mutually close direction closed, and by said fixing reflecting umbrella and upper and lower reflecting plate, projection to the luminous intensity distribution angle of the flash of light light beam of subject one side direction serially or multistage stage variation.
Described flasher is characterized in that:
Upper and lower reflecting plate also can be swung around it by the fulcrum parts carry, and its oscillating quantity is determined according to phtographic lens focal length variable quantity, and the amount of movement of being determined by subject at the actual amount of movement ratio of fixation reflex umbrella open side is big.
Described flasher is characterized in that:
Mutually during approximated position, its reflecting surface separately couples together with said fixing reflecting umbrella opening part reflecting surface respectively and is continuous variation upper and lower reflecting plate at fixation reflex umbrella opening part.
Described flasher is characterized in that:
Support upper and lower reflecting plate and the spindle unit parallel respectively and the kink that forms of end one is whole separately constitutes at this upper and lower reflecting plate respectively with the long limit of upper and lower reflecting plate.
A kind of flasher capable of varying light distribution angle, it can be used for having the camera of zoom lens, and flash of light projection light luminous intensity distribution angle can adjust, and it is characterized in that: have:
The strobo that roughly is cylindrical outer shape;
The bottom be equipped with above-mentioned strobo, and the rectangular aperture projection that light forms through the front portion and long limit is parallel with above-mentioned strobo that this strobo can the be sent light that on subject one side direction, meanwhile also this strobo can be sent reflect fixation reflex umbrella to above-mentioned subject one side direction;
The framework of the upper and lower reflecting plate that rectangular shaped and its long leg can be swung near the upper and lower reflecting plate of the upper and lower limit configuration of above-mentioned opening and fixing above-mentioned strobo and fixation reflex umbrella and supporting respectively;
Above-mentioned upper and lower reflecting plate is swung around making reverse mutually interlock with the axle of the long limit of above-mentioned rectangle equality with above-mentioned phtographic lens focal length variation, thereby makes projection to the flash of light beam direction of subject different the variation be taken place; On said frame, be provided with the upper and lower reflecting plate of supporting respectively around separately the centre of gyration from the moving branched shaft hole of electric pendulum with the inside surface location and the wall portion of the fixation reflex umbrella bottom contact matching of above-mentioned strobo is installed.
Flasher capable of varying light distribution angle of the present invention has following characteristic: this have receive in radiant emission light and with its projection to the catoptron of subject one side and throw in the adjustable flasher in the catoptrical luminous intensity distribution of subject angle, above-mentioned catoptron is configured to the axially movable structure in order to adjust above-mentioned luminous intensity distribution angle.Since be the structure that changes the luminous intensity distribution angle by the mechanical type mobile mirror, thus can realize the adjustment of projection light luminous intensity distribution angle with cheap price and simple structure, to improve its efficient.
Desirable structure is, above-mentioned catoptron is made up of to the changeless stationary mirror in the reflected light luminous intensity distribution angle of above-mentioned subject direction, moving reflector that above-mentioned reflected light luminous intensity distribution angle is adjustable and the driving mechanism that drives above-mentioned moving reflector projection.
The flasher that above-mentioned luminous intensity distribution angle is adjustable can be used for having in the camera (or the adjustable camera of photography subtended angle) of zoom lens, and its moving reflector is that interlock drives by the variation of above-mentioned zoom lens mid-focal length (or variation of above-mentioned photography subtended angle).
Above-mentioned stroboscopic light sources is roughly cylindrical strobo, the said fixing catoptron has the light reflection that above-mentioned strobo is sent after the opening of the place ahead formation throws the structure to subject one side, and above-mentioned moving reflector is made up of the upper and lower reflecting plate that last the place ahead that is configured in above-mentioned opening respectively and inferoanterior also can receive a part of light of opening ejaculation.This upper and lower reflecting plate changes with above-mentioned zoom lens focal length to be swung, and can adjust the luminous intensity distribution angle of projection to subject one lateral reflection light thus.Above-mentioned upper and lower reflecting plate is supported by the axle away from above-mentioned opening one side, when above-mentioned focal length is nearer, this the upper and lower reflecting plate that is driven by interlock near opening one side direction mutually away from the direction swing, when above-mentioned focal length is far away, swung near the approaching mutually direction of opening one side direction by this upper and lower reflecting plate that interlock drives.
Above-mentioned moving reflector changes with above-mentioned focal length and is driven, does continuous or stage change in location by interlock.Above-mentioned upper and lower reflecting plate and stationary mirror reflecting plate xsect, roughly all be parabolic shape.When above-mentioned focal length was far away, the reflecting surface of above-mentioned upper and lower reflecting plate was continuous variable condition setting with the parabola shaped reflecting surface of said fixing catoptron along above-mentioned peristome extend outwards part respectively substantially.
In addition, desirable structure is with the parallel respectively spindle unit in each limit of above-mentioned upper and lower reflecting plate and is set to integrative-structure at the kink of this upper and lower reflecting plate end formation respectively.
Also have, to achieve these goals, the relevant flasher capable of varying light distribution angle of the present invention that can be used for having the zoom lens camera is characterised in that: have the roughly cylindrical strobo of profile, the bottom is equipped with above-mentioned strobo, and the rectangular aperture projection that the light that this strobo can be sent forms through the front portion and long limit is parallel with above-mentioned strobo is on subject one side direction, the light reflection that meanwhile also this strobo can be sent is to the fixation reflex umbrella of above-mentioned subject one side direction, and rectangular shaped and its long leg are respectively near on the above-mentioned opening, on following, following reflecting plate and fixing above-mentioned strobo and fixation reflex umbrella and supporting can swing on, the framework of following reflecting plate; Above-mentioned upper and lower reflecting plate is done reverse mutually interlock swing with above-mentioned phtographic lens focal length variations around the axle parallel with the long limit of above-mentioned rectangle, thereby makes projection to the reflected light direction of subject different the variation be taken place; On said frame, be provided with branched shaft hole that the above-mentioned upper and lower reflecting plate of supporting freely swings around separately the centre of gyration respectively and with the bottom interior surface location and the wall portion of the fixation reflex umbrella bottom contact matching of above-mentioned strobo is installed.
Upper and lower reflecting plate rectangular shaped, its long separately limit is configured in the place, upper and lower position in above-mentioned opening the place ahead respectively, the interlock variation also takes place in the reflected light direction by its reception and back trend of purchasing subject one side that is reflected when above-mentioned phtographic lens focal length changes, and when focal length is nearer, its part near place, the upper and lower limit of fixation reflex umbrella opening is driven on the direction of leaving mutually opens, and when focal length was far away, above-mentioned part was driven on the close mutually direction closed.
The present invention has positive effect:
Can know clearly that by above explanation according to the present invention, the variation interlock of the swing of upper and lower reflecting plate and phtographic lens focal length (photography subtended angle) carries out.Along with above-mentioned swing, can make by the radiative part of strobo to be received by upper and lower reflecting plate and the reflection angle that reflects to subject direction one side changes.Can control the luminous intensity distribution angle thus.Above-mentioned tilting mechanism is made up of simple physical construction.Like this, do not using the high-performance camera lens also not need accurate travel mechanism, just can provide is light and the flasher capable of varying light distribution angle simple in structure, cheap, that the luminous intensity distribution angle can effectively be adjusted of not wasting light emitted under nearer state of focal length or the focal length state far away.In addition, the above-mentioned flasher capable of varying light distribution angle camera, luminous intensity distribution angle that are used to have zoom lens can be changed and the interlock adjustment by phtographic lens focal length and photography subtended angle.
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
Fig. 1 is the horizontal cross-sectional schematic of the relevant flasher capable of varying light distribution angle of the invention process form.
Fig. 2 is the perspective exploded view of flasher capable of varying light distribution angle shown in Figure 1.
Fig. 3 is the light distribution characteristic figure of flasher capable of varying light distribution angle illustrated in figures 1 and 2.
Fig. 4 is the luminous intensity distribution bias property synoptic diagram of flasher capable of varying light distribution angle illustrated in figures 1 and 2.
Fig. 5 is the upper and lower reflecting plate perspective exploded view of the relevant flasher capable of varying light distribution angle of other embodiment form of the present invention.
The flasher capable of varying light distribution angle of the invention process form is described according to Fig. 1～Fig. 4 below.
Flasher capable of varying light distribution angle 100 has reception and throws catoptron to the subject direction after reflection by the emission light of xenon discharge tube (stroboscopic light sources) 3.This catoptron roughly is parabolic shape, is made up of stationary mirror (fixation reflex umbrella) 2 and moving reflector.Stationary mirror 2 and xenon discharge tube 3 are fixedly mounted in the framework 1 by fixed head 4.Wherein xenon discharge tube 3 roughly is cylindric.
Moving reflector is made up of last reflecting plate 5 and following reflecting plate 6.Last reflecting plate 5 is arranged on the last anterior position of stationary mirror 2, reflecting plate 6 is arranged on the inferoanterior position of stationary mirror 2 down.The side of framework 1 is provided with axis hole 1m as shown in Figure 2, and this axis hole 1m is a through hole, inserts in it step pin 15 is installed.By this step pin 15 driving stem 7 is installed on the framework 1.The above-mentioned reflecting plate 5 of going up is swung by above-mentioned driving stem 7 drivings with following reflecting plate 6.
Each mating holes 1a, 1c, 1e, 1g place have formed gathering sill 1b, the 1d, 1f, the 1h that are communicated with above-mentioned each mating holes respectively in both sides.This each gathering sill is communicated with the place respectively with each mating holes width is slightly less than the diameter of each mating holes, and (frame openings one side) its groove width is more and more narrow on the opening direction.
Cooperate respectively to be supported with fulcrum 8～11 in above-mentioned each mating holes 1a, 1c of both sides, 1e, 1g, above-mentioned reflecting plate 5 and the following reflecting plate 6 gone up supports respectively on it and also can swing.Above-mentioned each fulcrum 8～11st enters each mating holes 1a, 1c, 1e, 1g by gathering sill 1b, 1d, 1f, 1h.Specifically, each fulcrum 8～11 has overcome the elastic properties of materials that forms framework 1 and defeats each gathering sill 1b, 1d, 1f, 1h and be bearing at last among each mating holes 1a, 1c, 1e, the 1g.Cooperate above-mentioned each gathering sill in back to play the effect that stops each fulcrum to be deviate from above-mentioned each mating holes at each fulcrum 8～11.
The place, both sides of framework 1 is formed with notch part 1i, 1j respectively.This notch part 1i, 1j are the boundary with the middle part at anterior (opening one side) and rear portion respectively, and its gap width is narrow more to the rear portion more.The rear portion of framework 1 has formed wall 1k, and this wall 1k cooperates with stationary mirror 2 bottom outer wall and is fixed.And xenon discharge tube 3 is located and installed to stationary mirror 2 bottom inside.
Said fixing catoptron 2 has the reflecting surface of top and the bottom and bottom setting, lays respectively at the peristome 2A of two sides and front.On its reflecting surface as front portion (opening 2A one side) is different with rear shape.Anterior form the reflecting surface 2d that section is parabolical, and the rear portion forms section and is the reflection of circular arc and 2c.It is consistent with xenon discharge tube 3 profiles that this reflecting surface 2c is the surface of circular arc, and with the tangent setting of reflecting surface 2d that is parabolical.
The both ends of fixed head 4 are provided with diameter roughly identical with the diameter of xenon discharge tube 3 through hole 4a, 4b respectively.After xenon discharge tube 3 inserted opening 2a, the 2b of stationary mirror 2, its two ends were projected into notch part 1i, 1j outside respectively.Hole 4a, the 4b of fixed head 4 stretched out by the inboard of framework 1 and is installed on the above-mentioned teat.It is banded that said fixing plate 4 is, and made by the heat proof material (as silicone rubber) that can bear xenon discharge tube 3 generation heat.Make the wall 1k of framework 1 and the bottom of stationary mirror 2 and the outer peripheral face of xenon discharge tube 3 combine closely and be fixed up like this.
Upper and lower reflecting plate 5,6 is rectangular in shape respectively, and its section is the parabolic shape of prolongation, inboard reflecting surface 5a and the 6a that is parabolic shape for section.Above-mentioned upper and lower reflecting plate 5,6 is separately positioned on last the place ahead and the inferoanterior of opening 2A.
The both ends of upper and lower reflecting plate 5,6 form kink 5b, 5c and 6b, the 6c of rectangular sigmoid respectively.Above-mentioned fulcrum 8～11 terminations are projected into the outside of above-mentioned kink 5b, 5c and 6b, 6c respectively.This each fulcrum 8～11 is arranged on upper and lower reflecting plate 5,6 an opening 2A side far away.
The kink 5c place of last reflecting plate 5 is provided with to cooperate and uses long through-hole 5d, and the insertion of the kink 6c place of reflecting plate 6 is provided with drive pin 12 down.This drive pin 12 embeds above-mentioned long through-hole 12 and cooperates with it, and its end cooperates with the slotted hole 7b of formation in the middle of driving stem 7 wrists.The bottom of this driving stem 7 is fixed with fulcrum 13.Be provided with tensioning spring 14 between near this fulcrum 13 driving stem 7 and the fixed position.This tensioning spring 14 hauls driving stem 7 all the time, makes it to be close to around as shown in Figure 1 step pin 15 clockwise direction.
This fulcrum 13 matches with the linkage part that is driven by focus adjusting mechanism not shown in the figures (or photography subtended angle adjusting mechanism) interlock.
In the flasher capable of varying light distribution angle of structure as mentioned above, upper and lower reflecting plate 5,6 can be the center swing around fulcrum 8～11, and this swing is undertaken by the adjustment action interlock of focus adjusting mechanism (or photography subtended angle adjusting mechanism).
When photographic lens during to a side shifting far away, drive fulcrum 13 by linkage part and rotate, make driving stem 7 around step pin 15 by clockwise direction swing shown in Figure 1.After linkage part was in farthest state, driving stem 7 was rocked to clockwise extreme position.At this moment, drive pin 12 is in the contacted halted state of slotted hole 7b with driving stem 7.Because drive pin 12 and the cooperation that cooperates long through-hole 5d, upper and lower reflecting plate 5,6 is in limit closure state respectively.Under this state, upper and lower reflecting plate 5,6 is in approximated position in opening 2A one side.At this moment, the reflecting surface of upper and lower reflecting plate 5,6 forms continually varying para-curve reflecting surface (with reference to the solid line among Fig. 1) with the parabolic shape reflecting surface of stationary mirror 2 at the prolongation of opening 2A one side respectively.
On the other hand,, press fulcrum 13 by linkage part when photographic lens during to the nearer side shifting of focus, make driving stem 7 around step pin 15 in counter-clockwise direction swing shown in Figure 1.Thus, by cooperating of drive pin 12 and long through-hole 5d, upper and lower reflecting plate 5,6 in opening 2A one side along the direction swing of leaving mutually (with reference to the dot-and-dash line among Fig. 1).
The axle center of xenon discharge tube 35 is positioned near the parabola shaped reflecting surface 2d focus.When xenon discharge tube 3 was luminous, the light of its emission can directly be invested the place ahead (subject direction) from opening 2A.Meanwhile, the light on other direction is also invested the subject direction from opening 2A after reflecting by circular arc reflecting surface 2c, parabola shaped reflecting surface 2d.In addition, a part of light that is projected by opening 2A reflects away by parabola shaped reflecting surface 5a6a.
Reflecting away direction of light by upper and lower reflecting plate 5,6 changes along with the swing of upper and lower reflecting plate 5,6.When the photography focal length was far away, the flash of light light beam was narrow, and corresponding to the photography subtended angle, the luminous intensity distribution angle is also very little.And focal length is when nearer, and the flash of light light beam is wide corresponding to the photography subtended angle, and it is big that the luminous intensity distribution angle becomes.
Fig. 3 has represented the light distribution characteristic (relation at guide number-GN and luminous intensity distribution angle) of above-mentioned flasher.Here, the xenon discharge tube diameter is 2mm, and arc length 14mm, electric capacity are 180 μ F.The opening 2A of stationary mirror 2 is 2.5mm to circular arc reflecting surface 2C bottom lengths.When expression focal length in ●-● is nearer, ▲-▲ relation when the expression focal length is far away.Can know that from Fig. 3 the pairing focal length of maximum guide number GN when focal length is nearer is a maximal value 11.3 when far away.In addition, on the scope greater than ± 20 ° of luminous intensity distribution angles, the GN value when the GN value when focal length is nearer becomes far away than focal length is big.Therefrom as can be known, use above-mentioned flasher, two kinds of situation glitter down light beams have all obtained effective utilization.
The relation at deviation △ EV and luminous intensity distribution angle when Fig. 4 has represented to be OEV with center, luminous intensity distribution angle.When expression focal length in ●-● is nearer, ▲-▲ relation when the expression focal length is far away.When focal length was nearer, its distance was 35mm, and the photography subtended angle is ± 30 °.When focal length was far away, its distance was 70mm, and the photography subtended angle is ± 10 °.As seen from Figure 4, when focal length was nearer, deviation △ EB was to the maximum-1EV about, and focal length is when far away, deviation △ EV is to the maximum-0.7EV.No matter the sort of situation is substantially all absorbed in exposure range by film.Can know in view of the above that in the photography subtended angle scope of necessity the wide of flasher projection causes on average.No matter also know simultaneously, be the focal length distance, and flasher capable of varying light distribution angle of the present invention all has good luminous intensity distribution feature.
In addition, the present invention also is limited in the flasher capable of varying light distribution angle of above-mentioned form of implementation, in the scope with foregoing invention main points, various modification can be arranged.
For example, available upper and lower reflecting plate 15,16 as shown in Figure 5 replaces above-mentioned upper and lower reflecting plate 5,6 respectively.This upper and lower reflecting plate 15 and 16 is whole kink 15b, 15c and 16b, the 16c of forming at both ends respectively.Respectively this kink 15b, 15c, 16b, 16c place difference integral body form fulcrum 18～21.This each 18～21 identical with fulcrum 8～11 effects in the above-mentioned form of implementation.Like this, because each spindle unit and catoptron form global facility,, further reduced cost so reduced component count.
In addition, elongated slot 15d shown in also available Fig. 5 replaces the long through-hole 5d among Fig. 2, and like this, and the assembling between the slotted hole 7b of driving stem 7 becomes and be easier to, and also reduced cost.
The difference of also with good grounds linkage part form, tensioning spring 14 also can be arranged to become reverse direction with the revolution clamping torque of driving stem 7.In this case, available torsionspring replaces tensioning spring 14 to produce the gyratory directions clamping torque.
It is parabola shaped that the shape of upper and lower baffle reflection face also is not limited to, and also can make ellipse or circular arc.The stationary mirror reflecting surface is not limited to parabola shaped too, also can make ellipse, plane or circular arc.
Because moving reflector and camera phtographic lens focal length (or photography subtended angle) interlock and the luminous intensity distribution angle that makes the light velocity that glistens be interlock thereupon, so also can be used as so-called automated imaging flasher.
Claims (15)
1, a kind of flasher capable of varying light distribution angle, it has can be with the catoptron of light reflection back projection on subject one side direction of stroboscopic light sources emission, and can adjust the luminous intensity distribution angle of projection light on above-mentioned subject one side direction, it is characterized in that: above-mentioned catoptron has for adjusting the structure that can move in above-mentioned luminous intensity distribution angle.
2, a kind of flasher capable of varying light distribution angle, it has the catoptron that the light reflection back of stroboscopic light sources emission can be throwed to subject one side direction, and can adjust the luminous intensity distribution angle of projection light on subject one side direction, it is characterized in that:
Above-mentioned catoptron is made up of variable moving reflector in stationary mirror, reflected light luminous intensity distribution angle that the reflected light projection reflected light luminous intensity distribution angle on above-mentioned subject one side direction is constant and the driving mechanism that drives above-mentioned moving reflector.
3, a kind of flasher capable of varying light distribution angle, its variable camera of subtended angle that is used to photograph, it has light reflection back projection that stroboscopic light sources is sent, and interlock changes with the variation of above-mentioned photography subtended angle to the reflected light luminous intensity distribution angle of subject to the catoptron of subject one side direction and above-mentioned projection, it is characterized in that:
Interlock drives the driving mechanism of above-mentioned moving reflector and forms above-mentioned catoptron by the stationary mirror that the reflected light projection reflected light luminous intensity distribution angle on above-mentioned subject one side direction is constant, moving reflector that reflected light luminous intensity distribution angle is adjustable with the variation of above-mentioned photography subtended angle.
4, a kind of flasher capable of varying light distribution angle, it is used to have the camera of zoom lens, it has the light that stroboscopic light sources is sent and reflects the catoptron of back projection to subject one side direction, and above-mentioned projection changes with above-mentioned zoom lens focal length and interlock changes to the reflected light luminous intensity distribution angle of subject, it is characterized in that:
Above-mentioned catoptron changes and interlock drives the driving mechanism of above-mentioned moving reflector and forms by the stationary mirror that the reflected light projection reflected light luminous intensity distribution angle on above-mentioned subject one side direction is constant, moving reflector that this reflected light luminous intensity distribution angle is adjustable with above-mentioned zoom lens focal length.
5, flasher capable of varying light distribution angle according to claim 4, it is characterized in that: above-mentioned stroboscopic light sources is slightly cylindrical strobo, the said fixing catoptron has the light reflection that above-mentioned strobo is sent after the opening of the place ahead formation throws the structure on subject one side direction, and above-mentioned moving reflector is made up of the upper and lower reflecting plate that last the place ahead that is configured in above-mentioned opening respectively and inferoanterior also can receive a part of light of opening ejaculation.
6, flasher capable of varying light distribution angle according to claim 5 is characterized in that: above-mentioned moving reflector changes with above-mentioned focal length and interlock changes its position, this change in location can be continuous, also can be stage.
7, flasher capable of varying light distribution angle according to claim 6, it is characterized in that: above-mentioned upper and lower reflecting plate is supported by the axle away from above-mentioned opening one side, when above-mentioned focal length is nearer, this the upper and lower reflecting plate that is driven by interlock near opening one side towards mutually away from the direction swing, when above-mentioned focal length was far away, close opening one side of this upper and lower reflecting plate that is driven by interlock was swung towards mutual approaching direction.
8, the flasher capable of varying light distribution angle of recording and narrating according to claim 7, it is characterized in that: the reflecting surface of above-mentioned upper and lower reflecting plate and stationary mirror roughly all is parabola shaped.
9, the flasher capable of varying light distribution angle of recording and narrating according to Claim 8, it is characterized in that: when above-mentioned focal length was far away, the reflecting surface of above-mentioned upper and lower reflecting plate was continuous variable condition setting with the parabola shaped reflecting surface of said fixing catoptron along above-mentioned peristome prolongation respectively substantially.
10, a kind of flasher capable of varying light distribution angle, it can be used for having in the camera of zoom lens and flash of light projection light luminous intensity distribution angle can be adjusted, and it is characterized in that having: the strobo that roughly is cylindrical outer shape;
The light that this strobo is sent reflects after the fixation reflex umbrella of opening projection on subject one side direction that the place ahead forms; With
Be configured in the last the place ahead and the inferoanterior upper and lower reflecting plate of above-mentioned opening respectively; This upper and lower reflecting plate receives a part of light of penetrating through above-mentioned opening and can change and interlock is made wallowing motion to change the direction of subject one side flash of light light beam with above-mentioned phtographic lens focal length.
11, the flasher of recording and narrating according to claim 10 is characterized in that:
Upper and lower reflection board structure is for when the phtographic lens focal length is nearer, its part near place, fixation reflex umbrella opening top is driven on the direction of leaving mutually opens, and when this phtographic lens focal length is far away, above-mentioned part is driven on the mutually close direction closed, and by said fixing reflecting umbrella and upper and lower reflecting plate, projection to the luminous intensity distribution angle of the flash of light light beam of subject one side direction serially or multistage stage variation.
12, the flasher of recording and narrating according to claim 10 is characterized in that:
Upper and lower reflecting plate also can be swung around it by the fulcrum parts carry, and its oscillating quantity is determined according to phtographic lens focal length variable quantity, and the amount of movement of being determined by subject at the actual amount of movement ratio of fixation reflex umbrella open side is big.
13, the flasher of recording and narrating according to claim 10 is characterized in that:
Mutually during approximated position, its reflecting surface separately couples together with said fixing reflecting umbrella opening part reflecting surface respectively and is continuous variation upper and lower reflecting plate at fixation reflex umbrella opening part.
14, the flasher of recording and narrating according to claim 10 is characterized in that:
Support upper and lower reflecting plate and the spindle unit parallel respectively and the kink that forms of end one is whole separately constitutes at this upper and lower reflecting plate respectively with the long limit of upper and lower reflecting plate.
15, a kind of flasher capable of varying light distribution angle, it can be used for having the camera of zoom lens, and flash of light projection light luminous intensity distribution angle can adjust, and it is characterized in that having:
The strobo that roughly is cylindrical outer shape;
The bottom be equipped with above-mentioned strobo, and the rectangular aperture projection that light forms through the front portion and long limit is parallel with above-mentioned strobo that this strobo can the be sent light that on subject one side direction, meanwhile also this strobo can be sent reflect fixation reflex umbrella to above-mentioned subject one side direction;
The framework of the upper and lower reflecting plate that rectangular shaped and its long leg can be swung near the upper and lower reflecting plate of the upper and lower limit configuration of above-mentioned opening and fixing above-mentioned strobo and fixation reflex umbrella and supporting respectively;
Above-mentioned upper and lower reflecting plate is swung around making reverse mutually interlock with the axle of the long limit of above-mentioned rectangle equality with above-mentioned phtographic lens focal length variation, thereby makes projection to the flash of light beam direction of subject different the variation be taken place; On said frame, be provided with the upper and lower reflecting plate of supporting respectively around separately the centre of gyration from the moving branched shaft hole of electric pendulum with the inside surface location and the wall portion of the fixation reflex umbrella bottom contact matching of above-mentioned strobo is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120379 CN1153318A (en) | 1995-10-20 | 1996-10-21 | Flasher capable of varying light distribution angle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP297623/95 | 1995-10-20 | ||
| CN 96120379 CN1153318A (en) | 1995-10-20 | 1996-10-21 | Flasher capable of varying light distribution angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153318A true CN1153318A (en) | 1997-07-02 |
Family
ID=5126286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96120379 Pending CN1153318A (en) | 1995-10-20 | 1996-10-21 | Flasher capable of varying light distribution angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153318A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307482C (en) * | 2001-12-13 | 2007-03-28 | 奥林巴斯光学工业株式会社 | Flash device, camera with said flash device and control method for said camera |
| CN102314048A (en) * | 2010-07-06 | 2012-01-11 | 思考电机（上海）有限公司 | Light irradiating device, camera device and mobile terminal device with a camera |
-
1996
- 1996-10-21 CN CN 96120379 patent/CN1153318A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307482C (en) * | 2001-12-13 | 2007-03-28 | 奥林巴斯光学工业株式会社 | Flash device, camera with said flash device and control method for said camera |
| CN102314048A (en) * | 2010-07-06 | 2012-01-11 | 思考电机（上海）有限公司 | Light irradiating device, camera device and mobile terminal device with a camera |
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