IT1261132B - Reticolo di diffrazione atto a generare un flusso di radiazione luminosa con distribuzione di intensita' prefissata in un'area sottendente il flusso stesso. - Google Patents

Reticolo di diffrazione atto a generare un flusso di radiazione luminosa con distribuzione di intensita' prefissata in un'area sottendente il flusso stesso.

Info

Publication number
IT1261132B
IT1261132B ITTO930988A ITTO930988A IT1261132B IT 1261132 B IT1261132 B IT 1261132B IT TO930988 A ITTO930988 A IT TO930988A IT TO930988 A ITTO930988 A IT TO930988A IT 1261132 B IT1261132 B IT 1261132B
Authority
IT
Italy
Prior art keywords
light radiation
generating
prefixed
flux
diffraction pattern
Prior art date
Application number
ITTO930988A
Other languages
English (en)
Inventor
Stefania Masuelli
Piero Perlo
Original Assignee
Carello Spa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carello Spa filed Critical Carello Spa
Priority to ITTO930988A priority Critical patent/IT1261132B/it
Publication of ITTO930988A0 publication Critical patent/ITTO930988A0/it
Priority to EP94120536A priority patent/EP0660139A1/en
Publication of ITTO930988A1 publication Critical patent/ITTO930988A1/it
Application granted granted Critical
Publication of IT1261132B publication Critical patent/IT1261132B/it

Links

Classifications

    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
    • G02B5/1871—Transmissive phase gratings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

Il reticolo di diffrazione dell'invenzione e atto a generare un flusso di radiazione luminosa in un'area prefissata (9) sottendente il flusso stesso e comprende almeno una superficie diffrattiva (1) del tipo a modulazione di fase presentante una pluralità di risalti diffrattivi (2), la cui disposizione è tale da generare un reticolo di diffrazione multiordine atto a distribuire detta radiazione luminosa in un numero di ordini di diffrazione superiore a 40, il numero degli ordini di diffrazzione suddetti, il profilo e le dimensioni di detti risalti diffrattivi del reticolo essendo combinati tra loro in modo tale che la radiazione luminosa emessa dal reticolo incida su detta area (9) con una distribuzione di intensità luminosa predefinita e con angoli di divergenza in due direzioni ortogonali prefissati.
ITTO930988A 1993-12-23 1993-12-23 Reticolo di diffrazione atto a generare un flusso di radiazione luminosa con distribuzione di intensita' prefissata in un'area sottendente il flusso stesso. IT1261132B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITTO930988A IT1261132B (it) 1993-12-23 1993-12-23 Reticolo di diffrazione atto a generare un flusso di radiazione luminosa con distribuzione di intensita' prefissata in un'area sottendente il flusso stesso.
EP94120536A EP0660139A1 (en) 1993-12-23 1994-12-23 Diffraction grating for generating a light beam with a predetermined light intensity distribution in an area subtending the beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO930988A IT1261132B (it) 1993-12-23 1993-12-23 Reticolo di diffrazione atto a generare un flusso di radiazione luminosa con distribuzione di intensita' prefissata in un'area sottendente il flusso stesso.

Publications (3)

Publication Number Publication Date
ITTO930988A0 ITTO930988A0 (it) 1993-12-23
ITTO930988A1 ITTO930988A1 (it) 1995-06-23
IT1261132B true IT1261132B (it) 1996-05-09

Family

ID=11411966

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO930988A IT1261132B (it) 1993-12-23 1993-12-23 Reticolo di diffrazione atto a generare un flusso di radiazione luminosa con distribuzione di intensita' prefissata in un'area sottendente il flusso stesso.

Country Status (2)

Country Link
EP (1) EP0660139A1 (it)
IT (1) IT1261132B (it)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2785364B1 (fr) * 1998-11-03 2000-12-22 Valeo Vision Feu de signalisation a diffraction, notamment pour vehicule automobile
DE10054503B4 (de) * 2000-11-03 2005-02-03 Ovd Kinegram Ag Lichtbeugende binäre Gitterstruktur und Sicherheitselement mit einer solchen Gitterstruktur
FR2919913B1 (fr) * 2007-08-10 2013-08-16 Valeo Vision Module optique pour dispositif d'eclairage et/ou de signalisation de vehicule
EP2136132A1 (de) * 2008-06-18 2009-12-23 odelo GmbH Leuchte
WO2012005684A1 (en) * 2010-07-05 2012-01-12 I3 Lab Pte Ltd Transmissive optical member in automotive led headlamp
GB2499579B (en) 2012-02-07 2014-11-26 Two Trees Photonics Ltd Lighting device
DE102013220448B4 (de) * 2013-10-10 2022-03-17 Zumtobel Lighting Gmbh Beleuchtungsanordnung mit Laser als Lichtquelle
CZ2014525A3 (cs) * 2014-08-03 2016-02-10 Filák, s.r.o. Světelný zdroj s difrakční strukturou, zejména pro řízené směrové osvětlení plochy
DE102016200847A1 (de) 2016-01-21 2017-07-27 Dr. Johannes Heidenhain Gesellschaft Mit Beschränkter Haftung Optische Positionsmesseinrichtung
FR3055691B1 (fr) * 2016-09-06 2019-08-23 Valeo Vision Module d'eclairage a ecran diffractif pour vehicule automobile
WO2018198760A1 (ja) * 2017-04-28 2018-11-01 株式会社小糸製作所 車両用照明灯具、及び車両用前照灯
EP3633266B1 (en) * 2017-05-22 2025-07-02 Dai Nippon Printing Co., Ltd. Illumination device
CN116540482A (zh) * 2022-01-26 2023-08-04 宜宾市极米光电有限公司 投影显示系统、方法及投影仪

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479490A3 (en) * 1990-10-02 1992-08-12 Physical Optics Corporation Volume holographic diffuser
DE4215584C2 (de) * 1992-05-12 2002-06-20 Bosch Gmbh Robert Beleuchtungseinrichtung mit einem Reflektor und mit optisch wirksamen Elementen

Also Published As

Publication number Publication date
ITTO930988A0 (it) 1993-12-23
ITTO930988A1 (it) 1995-06-23
EP0660139A1 (en) 1995-06-28

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971218