WO1988007221A2 - Projecteur de vues inanimees - Google Patents
Projecteur de vues inanimees Download PDFInfo
- Publication number
- WO1988007221A2 WO1988007221A2 PCT/CH1988/000059 CH8800059W WO8807221A2 WO 1988007221 A2 WO1988007221 A2 WO 1988007221A2 CH 8800059 W CH8800059 W CH 8800059W WO 8807221 A2 WO8807221 A2 WO 8807221A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- projector according
- reflector
- space
- views
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B23/00—Devices for changing pictures in viewing apparatus or projectors
- G03B23/18—Devices for changing pictures in viewing apparatus or projectors with fade-in and fade-out effects
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B23/00—Devices for changing pictures in viewing apparatus or projectors
Definitions
- the present invention makes it possible to maintain, aesthetically and with a brightness of intensity and density, ophthalmically, approximately constant, the illumination of a screen on which a projector of inanimate views, in particular of slides, successively projects the images, a auxiliary light passing through the lens of this projector during each exchange of views and, as are the exemplary embodiments, more generally as long as there is no view in the projection position.
- This invention therefore makes it possible, with simplicity and without drawbacks, to eliminate the vision torture to which observers of such images are usually constrained, the size of the pupils and the curvature of the lenses of their eyes then remaining constant, and provides in addition beneficial moments of relaxation between said images, the observation of which is otherwise demanding.
- Patent documents DE 2929328, EP 22909, FR 1591846 and US 37B575B describe an assembly of two mirrors crossed side by side moving together, each in its own plane, transverse to their inclinations relative to the axis of a single objective and the axis common to two identical light sources, symmetrically opposite and each illuminating a slide from which one of the two mirrors, alternately, reflects the light which comes therefrom towards said objective; in addition, on the one hand, the same US patent document describes another arrangement of the two mirrors differing in that they move simultaneously and asymmetrically, each longitudinally at its inclination, as well as the deflections of the two light beams by, for each, two other mirrors between which a slide is illuminated, all the light thus being produced by a single lamp but the focal length of said lens is then excessive for current use of the projector, and, on the other hand, the same documents of DE and EP patent describe a projector provided with a mirror reflecting the light coming from said objective.
- Patent documents DE 2723786 and SB 1582972 describe a combination of three mirrors, two of which reflect part of the light emitted by the lamp of a slide projector on an interchangeable color filter and of small surface optically located at the same distance from the objective of said projector that the location of illumination of the slides and the third, pivoting about an axis parallel to its own plane, alternately stops the light coming from said filter and that of illumination of the slides and, during their exchanges, reflects in the axis of said objective the light coming from said filter of which said projector projects a sharp image which, to produce a sufficient physiological effect, must be brilliant so that, by remanence of the locally more excited retinas, it is superimposed briefly on each new image of a slide; each of the progressive pivotings of the pivoting mirror produces at the start and at the end of the process of each of said exchanges a scan of the beam of reflected light and the twists and turns of this mirror are seen amplified by twice their amplitudes.
- a projector of inanimate views according to the present invention makes it possible to pleasantly light a screen between the images of the views which it projects successively without having to reflect their projection beam on at minus a mirror diminishing their qualities, without changes in the trajectory of the auxiliary light nor perceptible asymmetrical mobilities that the eyes would follow instinctively, without discontinuity or persistence of the excitations of their retinas, without complication of arrangement of views and the use of objectives of length current focal lengths being maintained.
- a mirror can be added to such a projector to return these beams to a transparent rear-projection screen.
- a projector can also illuminate an image sensor videoscopic, which he understands or which is external to him, to display the images of the views, for example, on the screen of a television set, this screen being thus illuminated between these images, either directly from said sensor, or after recording , for example, using a VCR.
- Figs. 1 and 2 show, respectively, another view of the shutter and the reflector of FIG. 4.
- Fig. 3 shows another view of the lever of FIGS. 4 and 7 for extracting the projected slides.
- Fig. 4 schematically shows an embodiment with a reflector moving by rotation.
- Figs. 5 and 6 each show another view of the pawl of FIG. 4.
- Fig. 7 shows, schematically, an embodiment with reflector moving by translation.
- Fig. 8 shows another view of the pawl of FIG. 7.
- Fig. 9 shows in section the assembled pads of FIG. 7.
- Fig. 10 shows the shape of the groove guiding said extraction lever.
- Fig. 11 shows, schematically, an embodiment with two reflectors moving progressively by translation.
- Fig. 12 shows the shape of the reflectors of FIG. 11. Ways to realize the invention
- each correspond to an adaptation of the invention to a slide projector with change of views by horizontal translation in the cases according to FIGS. 4 and 7 or with change of vertical views in the case according to FIG. 11; these examples are not limiting, the present invention being able to be adapted to a projector of inanimate views in general independently of its operating mode.
- the flat reflector 1 in the inserted position, reflects the beam of auxiliary light emitted in direction B by a source, not shown, which may consist, for example, of a lamp and a condenser, directs this light in the direction C coincided dant with the axis of the objective, not shown, of the projector and stops the beam of light emitted in direction A, coaxial with direction C, by a usual source, not shown, of illumination of the slides.
- the shutter 2 is coupled to the reflector 1 by the belt 3 stretched over the respective pulleys 5 and 4 secured to the respective axes 7 and 6 by two superimposed rollers 8, each of which can rotate freely around the same axis 9, only the upper roller being seen.
- the belt 3 can, for example, be glued to the pulleys 4 and 5 on each of the quarters of their circumferences which it does not leave.
- FIGS. 2 and 1 The sizes of the reflector 1 and of the flap 2, each seen from the side of the pulleys 4 and 5, are shown in FIGS. 2 and 1, respectively.
- the reflector 1 and the flap 2 rest on their respective stops 10 and 11 for damping their movements and the end 13, seen distinctly in FIG. 6, of the pawl 12, which can pivot on the axis 17, is, under the action of the spring 16, engaged in the notch 19, seen in FIG. 2, of the flange 18 integral with the reflector 1.
- the bearings integral with a rigid plate, at the ends of the axes 6, 7 and 17, are not shown.
- This stopper 21 is located at the top of the vertical branch, comprising a tenon 24 sliding in the groove 26 of the slide 25, of a lever 22, seen in FIG. 3, which can pivot around the pivot 23 secured to said arm 20 by which this lever 22 is driven.
- the vertical branch of the lever 22 of the extraction stopper 21 is partially maintained between the guide 29 and the slide 25 whose viewed faces are at the same height, the guide 29 being integral with said plate and the slide 25 fixed, for example, to the element holding the condenser, not shown, of the illumination beam of the slides.
- the lever 38 for controlling the reflector 1 moves in the slot 45, seen in FIG. 2, the rod 44 and, when the reflector 1 pivots, the rod 44 slides around this lever 38; during its movements, the connecting rod 44 is held by the spring 41 and the pin 47 passing through the lever 38.
- said arm 20 moved by the mechanism for changing views, pushes by its pivot 32 the latch 31 which, supported by its flap 33 against the cam 35, makes it pivot by pivoting itself simultaneously until that the end 40 of the lower branch of the lever 38 sliding on said flap 33 is released; under the action of the tensioned spring 42, this lever 38 pivots and, released, pushing the end 46 of the slot 45 of the connecting rod 44, makes it pivot again, but now in opposite directions, the reflector 1 and the flap 2 while that, by the rounding of the hook of its lower branch, it pushes said flap 33 so that the cam 35 returns to its position of equilibrium; the whole of the mechanism described is then again as shown in FIG. 4.
- the groove 25, seen in FIG. 10, of the slide 25 comprises an ascending part 26c so that the extraction stopper 21 is a stationary time so as to extract the projected slide only after the insertion of the reflector 1.
- the connecting rod 44, the pivot 43 and the spring 41 can be located on the other side of the reflector 1 and the tension spring 42 then replaced by a torsion spring situated around the spacer tightened against said plate by the screw 39 .
- the arm 20 of the view changing mechanism of the projector, its bearings 53, only one being seen, the insertion stopper 30, the latch 31 with its flap 33, pivot 32 and spring 34, and the extraction lever 22 with its stopper 21, tenon 24 and pivot 23, are identical to those of FIG. 4 as well as the cam 35 and its spring, not seen, being situated against the other face of the cam 35 fixed by its pivot 36 on the flange 81 riveted to a rigid plate;
- the projector also includes, but not shown, two guides su sliding frames of the slide frames, including the same lower guide, and the same slide as, respectively, the guide 29 and the slide 25 of FIG. 4.
- pivot 55 of the pawl 54 and the free view end of its spring 16 can also be fixed, for example, to a flange riveted to said plate.
- FIG. 7 corresponds to the end of the introduction of a not shown projection slide whose flat reflector 77, in the inserted position, stops the beam for its projection coming in direction A from the lamp 82 after having passed through a not shown condenser.
- This reflector 77 for example made of polished aluminum, is fixed, for example by means of screws or rivets with conical head, to four sleeves 79, of which only the two upper sleeves are seen, sliding on two equally spaced guides 78 rigidly held on said plate by two brackets 80, also only the upper guide being seen.
- FIG. 7 On either side of said plate, what other one in FIG. 7 also shows, in section, FIG. 9, are movable, separately from each other, an upper shoe 57 and a lower shoe 61, each pierced by a notch of the same languor 58 and
- the said plate also being pierced by a notch 66 extending to the ankle 59, and an upper spring 67 is tensioned between the ankles 64 and 59 and a lower spring 68 between the ankle 64 and the fixed ankle 69.
- the lower shoe 61 comprises a vertical wing 62, the beveled end 70 of which is supported on the flap 33 of the latch 31, and is thus driven by said arm 20 moved in the direction of introduction of a slide, which gradually tends the springs 67 and 68, the upper shoe 57 abutting against the end 56 of the pawl 54; at the end of this stroke of said arm 20, the cam 35, moving between said arm 20 and the lower spring 68 pushed back by said flap 33, the leg and frame of the slide to be projected, pushed by the insertion stopper 30, striking the stopper 15 of the lever 14, seen in FIG.
- said arm 20 now moved in the opposite direction, pushes by its pivot 32 the latch 31 which, supported by its flap 33 against the cam 35, makes it pivot by pivoting itself simultaneously until its flap 33 releases the end 70 of the wing 62 from the lower shoe 61, which, under the action of the tensioned lower spring 68, on the one hand, repels by the bevel of its wing 62 said flap 33 so that the cam 35 returns to its equilibrium position and, on the other hand, pushes the upper shoe 57 which carries with it the connecting rod 71 pulling on the crank 73 which, pulling on the connecting rod 76, replaces the reflector 77 in its inserted position.
- the light radiated in direction B "by the lamp 82 is successively diverted in the direction B 'by the diverting agent 83 then, the reflector 77 being in the inserted position, in the direction B by the diverting agent 84 and finally reflected towards the said objective in the direction C, coaxial with the direction A, by the reflector 77.
- the reflector 77 When the reflector 77 is in the withdrawn position, it then stops the auxiliary light beam between the agents 83 and 84.
- the projector comprises a rigid plate, a lens not shown whose axis coincides with directions A and C, a usual source of light, consisting of the lamp 82 and a condenser not shown, and a mechanism 85 for changing vertical views shown schematically.
- Fig. 11 corresponds to the beginning or the end of a process for changing slides, the slide 27 in its frame 28 being still or already in the projection position.
- brackets 86 and 87 To said plate are rigidly fixed, by means of brackets 86 and 87, two groups of each two guides 78, only the upper guides being seen, of the same equidistance and intersecting symmetrically with respect to the axis common to directions A and C .
- Two identical flat reflectors 88 for example in polished aluminum, the shape of which, seen from their mat side, is shown in FIG. 12, are fixed, like that of FIG. 11, each with three sleeves 79 sliding on a group of two guides 78 and are each connected by a pivot, not seen, secured to a sleeve 79 lower than its own connecting rod assembly, each consisting of a connecting rod 89 and a wheel toothed 90 pivoting around a pivot, not seen, secured to said plate.
- the pin 91 of a sleeve 79 actuates the limit switches, by their respective levers 97 and 99, the switches 96 and 98.
- the change of slides was controlled by pressing push-button 93 of the double switch 92 closing the supply circuit in electrical energy of the motor 94 the time that, by rotation of the worm 95 geared to a toothed wheel 90, the reflectors 88 starting to move, the limit switch 96, open during the projection of a slide , has closed this circuit; the motor 94 under tension inserts the reflectors 88 until actuating the limit switch 98 which closes the timer circuit 101 of the switch 100, which, on the one hand, controls the mechanism 85 for changing views of said projector and , on the other hand, opens the supply circuit of the motor 94 while said mechanism 85 begins to raise the projected slide by its frame, the monostable reverser 102 has opened this supply circuit; the frame of the following slide introduced actuates, by its lever 103, the reverser 102 which closes the power supply circuit
- the reflectors 88 remain inserted and the circuit then connected by the monostable inverter 102 makes it possible to control, by pres sion of the pushbutton 93 of the double switch 92, said mechanism 85 advancing [or retreating] the slide magazine, not shown, until a slide is placed in the projection position.
- the presence and absence of a slide in the projection position can also be detected by means, for example, of an opto-electronic detector controlling a contactor provided with an inverter replacing the monostable inverter 102.
- each beam of auxiliary light passes through a filter 50 so that this light is colored and the hole 52 of an opaque cover 51 approximately located at the same optical distance from said objective as the location of illumination of the slides in order to delimit the auxiliary illuminations preferably in the same format as that of the slide images or in a round or square format harmonizing with the mixed rectangular slide images as for their orientation.
- Each filter 50 is located outside the depth of the field of sharpness so as not to project dust images and it can be interchangeable so as to be able to change the color of the auxiliary lights.
- Each cover 51 can be interchangeable, deformable, comprising for example two plates in the shape of an "L" displaceable diagonally, or pivotable, in order to be able to modify the shape, the size and / or the orientation, as the case may be, of the auxiliary lights .
- Agents 83 and 84 of FIG. 7 and the agents 83 of FIG. 11 may each be a mirror or a prism reflecting the auxiliary light or a set of prism [s] and / or cylindrical lens [s] deflecting this light; the agents 84 of FIG. They must reflect the auxiliary light and can each be a mirror or a prism.
- each agent 83 can be replaced by a lamp and, in FIG. 7, the agent 84 can then also be replaced, as in FIG. 4, the flap 2 and its coupling to the reflector 1, by, for example, a contactor interrupting, as long as the reflector 77 or 1, respectively, is removed, the supply of the lamp producing the auxiliary light, this contactor being controlled by means, for example, of a switch actuated by this reflector 77 or 1.
- the auxiliary light can also be obtained from the lamp for the illumination of the slides by means of agents 83 and 84 as in FIG. 7.
- the movement mechanism of the reflector 77 can be replaced by a connecting rod assembly operated by a motor as in the case sel ⁇ in FIG. 11, the agent 83 then being reflective, but the effect produced would be, by its asymmetry, much less aesthetic.
- Fig. 7 two reflectors coupled, for example, by means of each a connecting rod connected to a common double control crank on either side of its pivot axis replacing the crank 73 or controlled by it by means of a connecting rod moved symmetrically in their same plane, the amplitude of release of the auxiliary light beam by the reflector furthest from said objective can be amplified by aforesaid assembly and this single beam can thus be reflected by each of these reflectors.
- each auxiliary light beam can also be stopped and released by, for example, an opaque curtain to which are attached the two ends of a cable moving on pulleys and wound on a mandrel integral, as the case may be, with said double crank, crank 73 or a gear 90, concentric with its pivot axis and a circumference corresponding according to its amplitude of rotation to the width of the hole 52 of the cover 51 concerned.
- each reflector 77 or 88 are longitudinal at its inclination relative to the axis of said objective.
- a reflector can also be moved transversely at its inclination and stop the auxiliary light in the withdrawn position, this light propagating at this location preferably transversely relative to the axis of said objective, and two such reflectors coupled as previously described can also be moved symmetrically in their same plane, the projector comprising two auxiliary light sources if these reflect their coupled torches are gradually moved, but this light must be diverted twice between its release and its reflection by such a reflector in order to bypass the pierced cover by delimiting its beam and, if such a reflector must reflect progressively and degressively the light which it thus frees, this light must be diverted by a reflecting agent and a deflecting agent; the amplitude of release of the auxiliary light beam by one of two such suddenly coupled reflectors can also be amplified by aforesaid assembly and this single beam can thus
- the reflector 1 can be replaced by a movable flat reflector by transverse translation at its inclination between two guides fixed perpendicularly to said plate by connecting it, by means of a connecting rod, to the end of an off-centered crank, integral with the flange 18, moving on the side of the back of this reflector, horizontal when it is lowered in the inserted position and vertical when it is raised in the withdrawn position; again for example, the spring 42 being replaced by a torsion spring and the connecting rod 44, the pivot 43 and the spring 41, located on the other side of the flange 18 secured in overhang of an elongated axis 6 towards the guide 29, the connecting rod of such a crank can be connected to the aforesaid double crank of two reflectors thus actuated symmetrically in their same plane.
- the shutter 2 and its coupling to the axis 6 are replaced by two agents diverting the auxiliary light then stopped and released by a reflector moved transversely to its inclination, this light coming from an independent lamp or, by means other diverting agents, the lamp for the illumination of the slides; in each of the same two cases, the auxiliary light can also be stopped by interrupting the supply of the independent lamp producing it as previously described.
- each auxiliary light source In cases where the light emitted by the lamp is diverted to illuminate the slides, each auxiliary light source consists of a virtual image of this lamp. Depending on the distance from each reflector to the light beam re auxiliary that it stops, the part of this reflector stopping this light when it is in the withdrawn position, without the need to be reflective towards said objective when it is in the inserted position, may be an opaque element connected to this reflector.
- each direction B is perpendicular to the axis common to directions A and C, but it is obvious that this is not essential.
- the present invention makes it possible to manufacture projectors for inanimate views, in particular for slides, preserving the view of image observers of such views.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1017/87-0 | 1987-03-18 | ||
| CH101787 | 1987-03-18 | ||
| CH315187 | 1987-08-17 | ||
| CH3151/87-2 | 1987-08-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1988007221A2 true WO1988007221A2 (fr) | 1988-09-22 |
| WO1988007221A3 WO1988007221A3 (fr) | 1988-11-17 |
Family
ID=25686397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CH1988/000059 Ceased WO1988007221A2 (fr) | 1987-03-18 | 1988-03-16 | Projecteur de vues inanimees |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0308439A1 (fr) |
| WO (1) | WO1988007221A2 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499707A (en) * | 1967-08-21 | 1970-03-10 | Minnesota Mining & Mfg | Photographic projection apparatus |
| DE2007758A1 (fr) * | 1969-02-22 | 1970-11-26 | ||
| DE2723786A1 (de) * | 1977-05-26 | 1978-12-07 | Rollei Werke Franke Heidecke | Magazinstehbildwerfer |
| FR2515833B1 (fr) * | 1981-11-02 | 1986-08-08 | Remy Joel | Projecteur de diapositives mono-objectif avec fondu enchaine |
-
1988
- 1988-03-16 EP EP19880902118 patent/EP0308439A1/fr not_active Withdrawn
- 1988-03-16 WO PCT/CH1988/000059 patent/WO1988007221A2/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO1988007221A3 (fr) | 1988-11-17 |
| EP0308439A1 (fr) | 1989-03-29 |
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