EP1021677B1 - Projector device with linear reflector - Google Patents
Projector device with linear reflector Download PDFInfo
- Publication number
- EP1021677B1 EP1021677B1 EP98964436A EP98964436A EP1021677B1 EP 1021677 B1 EP1021677 B1 EP 1021677B1 EP 98964436 A EP98964436 A EP 98964436A EP 98964436 A EP98964436 A EP 98964436A EP 1021677 B1 EP1021677 B1 EP 1021677B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- projector
- reflector
- projector device
- colour
- ellipse
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S10/00—Lighting devices or systems producing a varying lighting effect
- F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/12—Combinations of only three kinds of elements
- F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
- F21V23/0435—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by remote control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0025—Combination of two or more reflectors for a single light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
Definitions
- This invention relates to projectors of the type used to illuminate large buildings, monuments or open-air areas, and in particular to so-called colour changer projectors.
- Projectors of this type are already known. They comprise a reflector consisting of part of the surface of a solid of revolution obtained by rotating a suitable plane line having a focus.
- the solids of revolution used are normally ellipsoids or paraboloids.
- the ellipsoid obtained by rotating an ellipse about its major axis, is cut with a plane perpendicular to its major axis and is positioned such that the lamp lies at the focus.
- the luminous flux is concentrated at a point (in reality a small circular area) at the second focus of the ellipsoid, in the vicinity of which small-dimension coloration or dimming systems can be inserted.
- the solid of revolution used can also be a spherical mirror (a spherical cap) utilized in an elliptical configuration (ie the lamp is not positioned at the centre of the sphere but at a point coinciding with the ellipsoid to which the spherical cap approximates.
- a spherical mirror a spherical cap
- the lamp With the parabolic configuration the lamp is positioned at the focus of the paraboloid and hence the light rays emerge virtually parallel to its axis. Very often (again as a first approximation) a spherical mirror is used but in a parabolic configuration, ie the lamp being positioned at half the radius, so that the behaviour of the spherical cap is equivalent substantially to that of the paraboloid to which it approximates.
- the light sources usable in this type of projector have usually to be of small dimensions, they necessary have a relatively low power.
- the object of this invention is to obviate the aforesaid drawbacks of known colour changer projectors.
- the projector device of the invention characterised in that the reflector has a surface obtained by causing a suitable plane line to translate such that the surface thus obtained is able to generate a light beam having a substantially rectangular cross-section, a dimension of this cross-section decreasing in receding from the reflector until it becomes reduced to a strip having a width considerably less than the relative length, this dimension then increasing on continuing to recede from the reflector.
- linear reflector and the relative light source by "linear” source (which can consist of a discharge halogen, linear halogen or stroboscopic lamp).
- linear light source also means a light source formed from a series of aligned, (theoretically) point-shaped light sources (consisting for example of a series of lamp bulbs arranged as close as possible to each other along a rectilinear path).
- the plane line which on translation generates the aforedefined linear reflector surface is a portion of an ellipse or an arc of a circle approximating to an ellipse, although other lines which deviate slightly from the aforesaid lines enable the luminous flux to be concentrated into a strip of sufficiently small width for the aforesaid objects.
- a broken line consisting for example of rectilinear portions and/or circumferential arcs approximating to the pattern of said ellipse can enable an acceptable result to be obtained (ie of concentrating the luminous flux into a strip of sufficiently small width).
- the projector of the invention can be completed by a flat or internally concave reflector which closes each of the two ends of the linear reflector, this enabling the end luminous flux (ie that luminous flux which would emerge through the two ends of the linear reflector if it were open) to be recovered.
- the linear projector can be provided with an additional linear reflector of circular section positioned on each of the two sides of the main linear reflector, these additional reflectors enabling part of the luminous flux not intercepted by the main linear reflector to be recovered, in particular that part of the luminous flux which is not intercepted by the main linear reflector and which passes close but external to the sides of this latter.
- the projector of this invention can be of monochromatic type or of the so-called colour changer type, ie provided with a device of known type which can be of greater or lesser complexity and comprise colour filters, but with the significant advantage that the dimensions of the relative filters are extremely small compared with those of the filters of known colour changer projectors, to the extent of being able to be reduced in the limit to the dimensions of said strip into which the light beam can be concentrated.
- the projector can also be provided with a known colour-subtractive synthesis device, a known filter for converting the colour temperature of the luminous flux, a conventional mechanical dimmer, ie a device consisting of pairs of panels which can be moved towards each other to reduce the luminous flux emerging from the projector, or a conventional optical device comprising filters, diffusers and/or lenses and/or optical prisms.
- the projector device of the invention can comprise a control unit for the projector operation.
- the control unit can also be of the type which enables the projector operation to be programmed and can also comprise electronic dimmers, actuator means for executing the various functions and, if the projector is of the moving head type, for driving this latter, and auxiliary remote controls.
- the projector device of the invention can either consist of the projector 10 alone if of the colour changer type, or otherwise comprise this projector.
- the projector 10 comprises a linear reflector indicated by 12.
- the plane line used to generate the reflector 12 by translation consists of a part of an ellipse which is symmetrical about the major axis of the ellipse.
- a lamp 14 providing a light source of suitable length, is positioned at that of the two foci of the infinite ellipses forming the linear reflector 12 which is closer to this latter.
- a circular arc can be used as a first approximation as the plane line for generating the linear reflector, with the linear light source positioned at a suitable point along the axis of symmetry of the circular arc, intermediate between the centre of the circle and a point distant from the centre of the circle by one half the circle radius, ie coinciding with the focus of the ellipse which is to be approximated.
- the projector reflector can have a cross-section formed from portions of different ellipses all however having the same two foci.
- the reflector profile 12D continues along ever more internal ellipse portions 12D.2,.12D.3, ...12D.6 having the same foci L and F in common. This enables a reflector (and hence a projector) to be obtained which is of smaller width than the aforedescribed.
- the projector 10 is provided with a conventional mechanical dimmer, substantially consisting of two non-transparent panels 18A and 18B which can be moved towards each other to intercept the luminous flux emerging from the reflector 12, to hence reduce the luminous flux until it has been completely obscured.
- a conventional mechanical dimmer substantially consisting of two non-transparent panels 18A and 18B which can be moved towards each other to intercept the luminous flux emerging from the reflector 12, to hence reduce the luminous flux until it has been completely obscured.
- the projector 10 is also provided with a colour changer device comprising three conventional colour filters each consisting essentially of a pair of flat elements, respectively 20A and 20B of cyan colour (C), 22A and 22B of magenta colour (M), and 24A and 24B of yellow colour (Y), the flat elements of each pair being movable towards each other to increase colour saturation.
- These three filters enable so-called subtractive synthesis, well known to the expert of the art, to be achieved. It should however be noted that some or all the aforesaid filters can be dispensed with, this depending on the specific requirements and the results to be achieved.
- the projector can also be provided with a conventional filter for converting the colour temperature of the luminous flux.
- the projector 10 also comprises a conventional optical device (indicated schematically in the figures by a rectangle 26) which can comprise diffusers and/or lenses and/or optical prisms, these elements not being shown as they are well known to the expert of the art.
- a conventional optical device indicated schematically in the figures by a rectangle 26
- diffusers and/or lenses and/or optical prisms these elements not being shown as they are well known to the expert of the art.
- the dimmer 18A, 18B, and the filters 20A and 20B, 22A and 22B, 24A and 24B, including the colour temperature conversion filter (not shown in the figures), are positioned as close as possible to the strip 16 into which the luminous flux is concentrated, this enabling the dimensions of the aforelisted devices to be reduced to a minimum.
- the projector 10 is also provided, along each of the two sides of the reflector 12, with a respective linear reflector 32, 34 of circular cross-section (which could however also be formed from several flat or curved surfaces).
- the two additional reflectors 32 and 34 enable the luminous flux relative to the angles a1 and a2 to be recovered ( Figure 2), and which would otherwise be lost.
- This invention makes it possible to obtain a high-power projector by virtue of usually using linear light sources (long arc discharge lamps, linear halogen lamps and stroboscopic lamps), which can have very high power, generally greater than point-shaped light sources.
- linear light sources long arc discharge lamps, linear halogen lamps and stroboscopic lamps
- long arc discharge lamps are of relatively low cost and have a very long average life, considerably greater than that of short arc discharge lamps.
- the emerging light beam is rectangular, a shape which is normally more suitable for the external illumination of monuments, buildings and the like.
- the projector of the invention is provided with very efficient coloration and colour changer devices, mechanical dimmers and obscurers of truly small dimensions.
- the projector device 50 can comprise not only the projector 10 but also a control unit 52 for the projector operation.
- the unit 52 comprises a control interface 54 connected to a microprocessor 56 for controlling the control members, indicated overall by 58, for operating the stepping motors 60 for executing the various functions and for any required horizontal and/or vertical movement.
- the unit 52 also comprises a power unit 62 connected (as indicated by the arrow 64) to a source of electricity (such as the electric mains).
- the unit 52 also comprises a remote control means 66 connected via cables, infrared rays or radio to a reception interface 68 for the signals emitted by the remote control means 66.
- control unit 52 can be remotely operated to program and/or control the switching on and/or off of the projector, its dimming, its colour changes, the changing of the light beam dimensions and its horizontal and/or vertical movement.
Abstract
Description
However in this case the area involved by the luminous flux is rectangular but of large dimensions, hence the coloration systems are complicated, bulky and of low efficiency.
Claims (18)
- A projector device(50) in which the projector (10) comprises a light source (14) and a reflector (12) having a surface obtained by causing a suitable plane line to translate in order to generate a light beam having a substantially rectangular cross-section, a dimension of this cross-section decreasing in receding from the reflector (12) until it becomes reduced to a strip (16) having a width considerably less than the relative length, tnis dimension then increasing on continuing to recede from the reflector (12), the projector (10) comprising colour filters (20, 22, 24) located at or in the vicinity of that position (16) in which the cross-section of the ligth beam has minimum width.
- A projector device (50) as claimed in claim 1, wherein the plane line which on being translated generates the surface of the reflector (12) is a portion of an ellipse (12) or of a line (12A, 12B, 12C) which approximates to an ellipse, said portion being symmetrical about the ellipse axis, the linear light source (14) being located at that ellipse focus positioned closer to the reflector (12).
- A projector device as claimed in claim 2, wherein the line which approximates to an ellipse is a broken line (12B; 12C).
- A projector device as claimed in claim 3, wherein the broken line (12B) is formed from rectilinear portions (12B.2, 12B.3) and/or curvilinear portions (12A; 12B.1).
- A projector device as claimed in claim 4, wherein the broken line portions (12C) are rectilinear and have a greater length in those regions in which the ellipse portion which is approximated has lesser curvature, and vice versa.
- A projector device as claimed in claim 1, wherein the plane line (12D) which on being translated generates the surface of the reflector (12) comprises portions of different ellipses, all however having the same two foci (L and F), the portions of said plane line (12D), in gradually receding from the axis joining the common foci L and F, pertaining to gradually more inner or more outer ellipses.
- A projector device (50) as claimed in claim 1, wherein the projector (10) also comprises flat or internally concave reflector (28, 30) which closes each of the two ends of the linear reflector (12).
- A projector device (50) as claimed in claim 1, wherein the projector (10) also comprises an additional linear reflector (32, 34) of circular cross-section formed from several flat or curved surfaces, and located on each of the two sides of the main linear reflector (12) to recover part of the luminous flux not intercepted by the main linear reflector (12).
- A projector device (50) as claimed in claim 1, wherein the projector (10) comprises a colour changer device (20A, 20B, 22A, 22B, 24A, 24B) of colour-subtractive synthesis type located at or in the vicinity of that cross-section position (16) in which the light beam has minimum width.
- A projector device (50) as claimed in claim 9 , wherein the colour changer device of the projector (10) comprises three colour filters (20A, 20B, 22A, 22B, 24A, 24B), each comprising a pair of flat elements, of cyan , magenta and yellow colour respectively, which can be moved towards each other to increase colour saturation.
- A projector device (50) as claimed in claim 1, comprising a filter for converting the colour temperature of the luminous flux, located at or in the vicinity of that cross-section position in which the light beam has minimum width.
- A projector device (50) as claimed in claim 1, wherein the projector (10) comprises a mechanical dimmer (18) for varying the luminous flux emerging from the projector (10), the dimmer being located at or in the vicinity of that position (16) in which the cross-section of the light beam has minimum width.
- A projector device (50) as claimed in claim 12, wherein the mechanical dimmer of the ellipse (10) comprises two non-transparent panels (18A, 18B) which can be moved towards each other to intercept the luminous flux emerging from the reflector (12) in order to reduce the luminous flux until it has been completely obscured.
- A projector device (50) as claimed in claim 1, wherein additional filters, diffusers and/or optical elements and/or prisms are provided in the projector (10).
- A projector device (50) as claimed in claim 1, comprising a possibly programmable control unit (52) for the operation of the projector (10).
- A projector device (50) as claimed in claim 15, wherein the control unit (52) comprises a control interface (54) connected to a microprocessor (55) for controlling the driver circuits (58) of the stepping motors (60) for executing the functions and the movement of the projector (10).
- A projector device as claimed in claim 15, wherein the control unit (52) comprises electronic circuits for regulating the electric power to the lamp (14).
- A projector device (50) as claimed in claim 15, wherein the control unit (52) comprises a remote control means (66) connected to a reception interface (68) for the signals emitted by the remote control means (66).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT98VT000001 IT246384Y1 (en) | 1998-02-05 | 1998-02-05 | COLOR CHANGE PROJECTOR CHARACTERIZED BY LINEAR REFLECTOR ELLIPTICAL SECTION WITH SIMPLE OR COMBINED COLORING SYSTEM |
ITVT980001U | 1998-02-05 | ||
IT1998VT000003 IT246386Y1 (en) | 1998-10-28 | 1998-10-28 | PROJECTOR DEVICE WITH LINEAR REFLECTOR. |
ITVT980003U | 1998-10-28 | ||
PCT/EP1998/007573 WO1999040361A1 (en) | 1998-02-05 | 1998-11-24 | Projector device with linear reflector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1021677A1 EP1021677A1 (en) | 2000-07-26 |
EP1021677B1 true EP1021677B1 (en) | 2001-03-28 |
Family
ID=26332659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98964436A Expired - Lifetime EP1021677B1 (en) | 1998-02-05 | 1998-11-24 | Projector device with linear reflector |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1021677B1 (en) |
CN (1) | CN1099541C (en) |
AT (1) | ATE200146T1 (en) |
AU (1) | AU1963799A (en) |
CA (1) | CA2320478A1 (en) |
DE (1) | DE69800646T2 (en) |
DK (1) | DK1021677T3 (en) |
WO (1) | WO1999040361A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1317660B1 (en) * | 2000-05-22 | 2003-07-15 | Coemar Spa | BRIGHT PROJECTOR PARTICULARLY FOR THE PROJECTION OF ADINFINITE COLORS OF LIGHT, WITH HIGH POWER OF THE BEAM. |
JP4360945B2 (en) * | 2004-03-10 | 2009-11-11 | シチズン電子株式会社 | Lighting device |
CN100412646C (en) * | 2004-05-08 | 2008-08-20 | 凛宜股份有限公司 | Light source device |
US8032017B2 (en) | 2006-09-29 | 2011-10-04 | Microscan Systems, Inc. | Methods for providing diffuse light |
US7978970B2 (en) | 2006-09-29 | 2011-07-12 | Microscan Systems, Inc. | Systems and/or devices for providing diffuse light |
US8374498B2 (en) | 2006-09-29 | 2013-02-12 | Microscan Systems, Inc. | Systems and/or devices for camera-based inspections |
FR2918736B1 (en) * | 2007-07-11 | 2013-04-05 | Rve Technologie | SCENIC LIGHTING PROJECTOR. |
CN101749638B (en) * | 2008-11-28 | 2012-06-13 | 富士迈半导体精密工业(上海)有限公司 | Indoor lamp |
US8000594B2 (en) | 2009-07-02 | 2011-08-16 | Microscan Systems, Inc. | Diffuse reflective illuminator |
US8107808B2 (en) * | 2009-07-10 | 2012-01-31 | Microscan Systems, Inc. | Combination dark field and bright field illuminator |
US8768159B2 (en) | 2009-07-10 | 2014-07-01 | Microscan Systems, Inc. | Combination dark field and bright field illuminator |
US10197244B2 (en) | 2014-03-12 | 2019-02-05 | Clay Paky S.P.A. | Stage light fixture |
WO2018126880A1 (en) * | 2017-01-06 | 2018-07-12 | 上海开腾信号设备有限公司 | Lighting system integrating high and low beams, low beam headlamp, and high beam headlamp |
CN108613108A (en) * | 2017-01-06 | 2018-10-02 | 上海开腾信号设备有限公司 | Distance-light integrated illumination system and lower beam headlamp, high beam headlamp |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE498054A (en) * | ||||
DE2634241A1 (en) * | 1975-10-06 | 1977-04-14 | Ibm | HIGHLY EFFECTIVE LIGHTING SYSTEM |
FR2582780B1 (en) * | 1985-05-31 | 1988-09-09 | Cameleon | LIGHTING DEVICE, PARTICULARLY ADJUSTABLE SCENIC PROJECTOR ACCORDING TO ALL ITS PARAMETERS |
DE8715104U1 (en) * | 1987-11-13 | 1988-04-14 | S.L.E. Gmbh, 7850 Loerrach, De | |
FR2631684B1 (en) * | 1988-05-20 | 1993-02-19 | Leclercq Didier | LIGHT BEAM COLORING DEVICE |
US4939629A (en) * | 1989-06-05 | 1990-07-03 | General Electric Company | Compact luminaire including a double-ended lamp |
DE9310640U1 (en) * | 1993-07-16 | 1993-10-14 | Wiska Hoppmann & Mulsow Gmbh | Lashgang spotlights |
DE19532877A1 (en) * | 1995-09-06 | 1997-03-13 | Giesecke & Devrient Gmbh | Device for linear lighting of sheet material, such as. B. banknotes or securities |
IT1282621B1 (en) * | 1996-02-14 | 1998-03-31 | Artemide Spa | POLYCHROMATIC LIGHTING DEVICE, ESPECIALLY FOR DECORATIVE ILLUMINATION OF ROOMS AND SIMILAR |
-
1998
- 1998-11-24 CA CA002320478A patent/CA2320478A1/en not_active Abandoned
- 1998-11-24 WO PCT/EP1998/007573 patent/WO1999040361A1/en active IP Right Grant
- 1998-11-24 DE DE69800646T patent/DE69800646T2/en not_active Expired - Fee Related
- 1998-11-24 CN CN98805400A patent/CN1099541C/en not_active Expired - Fee Related
- 1998-11-24 EP EP98964436A patent/EP1021677B1/en not_active Expired - Lifetime
- 1998-11-24 AU AU19637/99A patent/AU1963799A/en not_active Abandoned
- 1998-11-24 AT AT98964436T patent/ATE200146T1/en not_active IP Right Cessation
- 1998-11-24 DK DK98964436T patent/DK1021677T3/en active
Also Published As
Publication number | Publication date |
---|---|
DE69800646T2 (en) | 2001-09-20 |
CN1263589A (en) | 2000-08-16 |
AU1963799A (en) | 1999-08-23 |
ATE200146T1 (en) | 2001-04-15 |
CN1099541C (en) | 2003-01-22 |
WO1999040361A1 (en) | 1999-08-12 |
CA2320478A1 (en) | 1999-08-12 |
DE69800646D1 (en) | 2001-05-03 |
EP1021677A1 (en) | 2000-07-26 |
DK1021677T3 (en) | 2001-04-30 |
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