EP0657111B1 - Augenschirm mit veränderlicher Lichtdurchlässigkeit für Kopfbedeckung - Google Patents

Augenschirm mit veränderlicher Lichtdurchlässigkeit für Kopfbedeckung Download PDF

Info

Publication number
EP0657111B1
EP0657111B1 EP94402802A EP94402802A EP0657111B1 EP 0657111 B1 EP0657111 B1 EP 0657111B1 EP 94402802 A EP94402802 A EP 94402802A EP 94402802 A EP94402802 A EP 94402802A EP 0657111 B1 EP0657111 B1 EP 0657111B1
Authority
EP
European Patent Office
Prior art keywords
visor
zone
visor according
pilot
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.)
Expired - Lifetime
Application number
EP94402802A
Other languages
English (en)
French (fr)
Other versions
EP0657111A1 (de
Inventor
Yves Lefort
Gérard Le Paih
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales Avionics SAS
Original Assignee
Thales Avionics SAS
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 Thales Avionics SAS filed Critical Thales Avionics SAS
Publication of EP0657111A1 publication Critical patent/EP0657111A1/de
Application granted granted Critical
Publication of EP0657111B1 publication Critical patent/EP0657111B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A42B3/22—Visors
    • A42B3/226—Visors with sunscreens, e.g. tinted or dual visor

Definitions

  • the present invention relates to a head equipment visor with variable light transmission. It applies in particular to helmet equipment for aircraft pilots. More generally it applies to protection systems that need to be released from slow transmission constraints notably due to the element absorbent consisting of photochromic agents.
  • a visor fitted to an aircraft pilot helmet presents generally two essential protective functions.
  • a first protection is a facial protection against mechanical aggressions outside. This protection is usually provided by a blade often cylindrical or spherical in transparent thermoplastic material, in polycarbonate for example.
  • a second protection is an eye protection with respect to the solar radiation
  • the visor can therefore tint or lighten absorb more or less light energy reversibly by function of ambient light due to the presence of substances chemicals integrated into the thickness or surface of the visor. These substances which vary the color of the material which they integrate into depending on the brightness are called photochromic.
  • these photochromic substances are made up of molecules whose structure changes reversibly under the effect of photons they receive, this modification causing a Color change.
  • Known photochromic substances and used for example are the families of spiropyrans or spiroxazines.
  • variable transmission visors composed of a transparent thermoplastic strip, the photochromic substance being incorporated during injection of the part or sprayed on the surface or by molding for example. These visors absorb part of the energy identical incident light at any point on the visor.
  • a plastic based on photochromic substances can present in a clear state a light transmission of the order of 75% at 85%. In the presence of strong light, the plastic reaches a dark state and the transmission may decrease to values between 20% and 30% for example.
  • Light and dark transmissions depend on the nature of the photochromic substances used or the composition of the mixture of these. These transmissions also depend on the concentrations respective photochromic substances in the thickness or on the surface of the visor.
  • the reaction times of Photochromic substances are generally long. These times of reaction are of the order of a minute to darkening and several minutes to lightening.
  • a pilot needs a clear visor when the light is weak and a dark visor when it meets these lighting conditions intense, when passing over the cloud layer for example.
  • a conventional photochromic visor as defined above poorly satisfies the pilot's need. It is usually too light or too dark due to the aforementioned too long reaction times inherent in the very nature of photochromic substances, it is in particular the passage from the dark state to the light state which is done too late. This has consequence of hampering the pilot's vision and therefore of reducing his safety.
  • Japanese patent JP-A-04 245 904 presents a visor head gear with variable transmission.
  • a patent application European EP-A-0099524 and a German patent application DE-A-41 06 019 present an optical device with variable transmission.
  • the object of the invention is to overcome the aforementioned drawbacks in particular by proposing a visor architecture adapted to the work accomplished by the visor wearer, an airplane pilot for example, this architecture enabling the carrier to be freed from the aforementioned reaction times.
  • the invention relates to a visor of equipment for variable light transmission head as defined in claim 1.
  • the main advantages of the invention are that it improves the safety and comfort of vision of the wearer of the visor, which it allows in the helmet visual case with projection of symbols on the visor, a increased contrast of the image projected inside the visor, thus improving the readability of information, that it is economical and easy to implement.
  • Figure 1 shows by way of example a pilot 1 wearing a helmet 2 fitted with a visor 3.
  • the pilot is for example in cockpit 4 of a airplane 5 of which only the front part is shown.
  • the pilot must be able to look outside the plane and on-board instruments 6 with as much comfort as possible. He should not especially not be bothered by intense light rays.
  • the structure of the visor according to the invention uses the fact that not all parts of the visor are functionally identical.
  • the visor according to the invention then comprises at least two zones different absorption of light, that of higher absorption corresponding to the part of the wearer's visual field that requires worse perception than the lowest absorption part.
  • the carrier is an airplane pilot
  • the first part corresponds by example from the outside of the plane and the second part from the on-board instruments.
  • the transition are different from one zone to another, that is to say that the speeds of reaction of photochromic substances or LCD materials are different from one area to another.
  • the variation of the transmission is then more or slower from one area to another. In the case of application to a pilot plane, it is thus advantageous that the transition speed of the zone as fast as possible.
  • the variable transmission can be ensured by a combination of photochromic and LCD technologies to obtain speeds of different transition from one area to another.
  • Figure 2 illustrates the principle of making a visor according to the invention equipping the pilot represented in FIG. 1.
  • the visor 3 is broken down into two zones 31, 32 corresponding to vertical viewing angles ⁇ 1 and ⁇ 2 swept by the gaze of the pilot 1 and originating from the pilot's eye 7 1 for example.
  • the direction chosen as the origin for the pilot's gaze is for example the direction 8 seen by the eye 7 when the latter is at rest.
  • the upper zone 31 of the visor corresponds to an angle ⁇ 1 between a first angle ⁇ H and a second angle ⁇ HB taken relative to the original direction 8 and the lower zone 32 corresponds to an angle ⁇ 2 between the second ⁇ HB and a third angle ⁇ B taken with respect to the origin direction 8.
  • ⁇ H can be equal to + 70 °, ⁇ HB at -25 ° and ⁇ B at -35 °.
  • the upper zone 31 of the visor 3 corresponds to a viewing angle of between + 70 ° above and -25 ° below the original direction 8 and that the low zone 32 of the visor 3 corresponds to a viewing angle between -25 ° and -35 ° below the original direction 8.
  • the upper zone 31 is used for example essentially to look at outside the plane. This part notably provides good protection against solar radiation.
  • the lower zone 32 for example must remain lighter than the upper zone 31 even in the event of intense light radiation. Indeed in all circumstances but especially when the pilot goes from a sunny space to a dark space where visibility is reduced, he needs to consult his on-board instruments. It is then the lower zone 32 of the visor which is stressed. The pilot also need good color perception to read symbols on screens and other on-board indicators 6. It is therefore harmful to the pilot that reaction times too long for the transition to the lightening of the visor disturbs its reading of the on-board instruments.
  • photochromic substances and their concentration is done for example so as to promote a strong absorption in the upper zone 31 of the visor.
  • the transmission range of this area can by example vary between 75% and 20%, from light to dark.
  • the invention has an advantage additional because it allows an increase in image contrast projected inside the visor 3 onto its upper zone 31. The legibility of the information is thus greatly increased.
  • the choice of photochromic substances is such that this area absorbs less light than the upper zone 31 and its transmission range of the light is reduced compared to this high area.
  • Transmission range of the lower zone 32 can for example vary between 85% and 40% of the clear state in the dark state.
  • the photochromic substances of the low zone 32 are for example also chosen so as to increase the reaction rates and to obtain as neutral as possible attenuation of the colors on the whole visible spectrum to promote a good perception of on-board indicators and cathode visualization screens for example.
  • the absorption means used in the visor according to the invention can for example be photochromic substances as described previously, or any other type of absorbent.
  • the visor can be broken down into more than two areas. So, for example, to the two areas described above could be added a zone dedicated to reading specific indicators such as for example a head-up display console requiring in particular good appreciation of the color of certain symbols.
  • the layout of the zones may not be distributed from top to bottom, but also for example from right to left, in the case in particular where superimposed on reaction time constraints appreciation of colors or shapes according to areas of good spaces defined around the pilot.
  • the application of the visor according to the invention has been presented for an airplane pilot, however it can be used for other applications, especially for pilots of all types of aircraft.

Landscapes

  • Helmets And Other Head Coverings (AREA)
  • Liquid Crystal (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Claims (12)

  1. Sichtscheibe mit variablem Lichtdurchlaß, die mindestens zwei Zonen (31, 32) mit unterschiedlicher Lichtabsorption enthält, von denen jede einer Zone des Außenraums (α1, α2) gewidmet ist, die durch den Blick überstrichen wird, dadurch gekennzeichnet, daß die Lichtdurchlaßgrade der Zonen mit unterschiedlichen Übergangsgeschwindigkeiten variieren.
  2. Sichtscheibe nach Anspruch 1, dadurch gekennzeichnet, daß sie eine obere Zone (31) und eine untere Zone (32) besitzt, wobei die obere Zone mehr Licht als die untere Zone (32) absorbiert.
  3. Sichtscheibe nach Anspruch 2, dadurch gekennzeichnet, daß die Übergangsgeschwindigkeit in der unteren Zone (32) größer als in der oberen Zone (31) ist.
  4. Sichtscheibe nach einem beliebigen der Ansprüche 2 und 3, dadurch gekennzeichnet, daß die untere Zone (32) einen Bereich der Lichtdurchlaßgrade besitzt, in dem höhere Durchlaßgrade als in der oberen Zone erreicht werden.
  5. Sichtscheibe nach einem beliebigen der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß für eine Sichtscheibe (3) eines Piloten (1) eines Flugzeugs (5) die obere Zone der Beobachtung der äußeren Landschaft (α1) um das Flugzeug (5) dient.
  6. Sichtscheibe nach einem beliebigen der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß für eine Sichtscheibe (3) eines Flugzeugpiloten (1) die untere Zone (32) der Beobachtung der Bordinstrumente (6) des Flugzeugs dient.
  7. Sichtscheibe nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Zone (31) mit der größeren Lichtabsorption einen Lichtdurchlaßgrad zwischen 75% und 20% besitzt.
  8. Sichtscheibe nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Zone (32) mit der geringeren Absorption einen Bereich der Lichtdurchlaßgrade zwischen 85% und 40% besitzt.
  9. Sichtscheibe nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß für eine Sichtscheibe (3) mit phototropen Substanzen die verschiedenen Zonen (31, 32) unterschiedliche Konzentrationen an phototropen Substanzen enthalten.
  10. Sichtscheibe nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß für eine Sichtscheibe (3) mit phototropen Substanzen die unterschiedlichen Zonen (31, 32) unterschiedliche phototrope Substanzen enthalten.
  11. Sichtscheibe nach einem beliebigen der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Funktion des variablen Lichtdurchlasses durch ein LCD-Material erreicht wird.
  12. Sichtscheibe nach einem beliebigen der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der variable Lichtdurchlaß durch eine Kombination von phototropen und LCD-Technologien erreicht wird, durch die unterschiedliche Übergangsgeschwindigkeiten in den Zonen erreicht werden.
EP94402802A 1993-12-10 1994-12-06 Augenschirm mit veränderlicher Lichtdurchlässigkeit für Kopfbedeckung Expired - Lifetime EP0657111B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9314870A FR2713449B1 (fr) 1993-12-10 1993-12-10 Visière d'équipement de tête à transmission variable.
FR9314870 1993-12-10

Publications (2)

Publication Number Publication Date
EP0657111A1 EP0657111A1 (de) 1995-06-14
EP0657111B1 true EP0657111B1 (de) 1999-05-12

Family

ID=9453806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402802A Expired - Lifetime EP0657111B1 (de) 1993-12-10 1994-12-06 Augenschirm mit veränderlicher Lichtdurchlässigkeit für Kopfbedeckung

Country Status (8)

Country Link
US (1) US5640711A (de)
EP (1) EP0657111B1 (de)
JP (1) JPH07267194A (de)
CA (1) CA2137619A1 (de)
DE (1) DE69418434T2 (de)
ES (1) ES2132360T3 (de)
FR (1) FR2713449B1 (de)
IL (1) IL111726A (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742230B1 (fr) * 1995-12-12 1998-01-09 Sextant Avionique Accelerometre et procede de fabrication
FR2742636B1 (fr) * 1995-12-26 1998-02-06 Sextant Avionique Casque a dispositif de vision nocturne a securite et ergonomie optimisees
US6195206B1 (en) 1998-01-13 2001-02-27 Elbit Systems Ltd. Optical system for day and night use
SE514273C2 (sv) 1999-05-11 2001-01-29 Peltor Ab Skyddsvisir
US20110209319A1 (en) * 2003-12-05 2011-09-01 Williams Scott M Photosensitive cockpit windshield
WO2007031892A1 (en) * 2005-09-15 2007-03-22 Koninklijke Philips Electronics N.V. Optical filter
US7328998B2 (en) * 2006-05-31 2008-02-12 Hobbs Raymond L Specially tinted lenses for sunglasses for use during flying
NL1033103C2 (nl) * 2006-12-21 2008-06-24 Hd Inspiration Holding B V Vizier voorzien van UV gevoelig materiaal.
ITVI20090262A1 (it) * 2009-10-29 2011-04-30 Roberto Anzolin Casco protettivo perfezionato
IL213727A (en) 2011-06-22 2015-01-29 Elbit Systems Ltd A display system installed on a helmet suitable for bright ambient lighting conditions
IL235088A (en) 2014-10-07 2017-06-29 Elbit Systems Ltd Helmet system with variable light transmission coefficient
US20230350114A1 (en) * 2022-04-27 2023-11-02 Hamilton Sundstrand Corporation Photochromatic transition glass for a helmet of a space suit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815508A (en) * 1954-11-15 1957-12-10 Leonard P Frieder Helmet with retractable eye shield
US4080051A (en) * 1976-03-18 1978-03-21 American Optical Corporation Preparation of photochromic gradient lenses of cosmetically improved color
FR2394261A1 (fr) * 1977-06-16 1979-01-12 Gonichon Pascal Nouveau pare-brise pour casque tel que de motocycliste
US4482326A (en) * 1982-01-26 1984-11-13 Instrument Flight Research Inc. Flight training glasses
DE3225863A1 (de) * 1982-07-10 1984-01-12 Heinz Dr. 5000 Köln Kunert Augenvorsatzscheiben, insbesondere fuer kraftfahrzeuglenker
IL93602A0 (en) * 1990-03-02 1990-12-23 Neta Holland Light-transmissive window and electro-optical control thereof
JPH04245904A (ja) * 1991-01-29 1992-09-02 Suzuki Motor Corp ヘルメット用調光シールド

Also Published As

Publication number Publication date
CA2137619A1 (fr) 1995-06-11
IL111726A (en) 1997-06-10
IL111726A0 (en) 1995-01-24
DE69418434T2 (de) 1999-10-07
DE69418434D1 (de) 1999-06-17
US5640711A (en) 1997-06-24
FR2713449A1 (fr) 1995-06-16
JPH07267194A (ja) 1995-10-17
EP0657111A1 (de) 1995-06-14
FR2713449B1 (fr) 1996-01-05
ES2132360T3 (es) 1999-08-16

Similar Documents

Publication Publication Date Title
EP0657111B1 (de) Augenschirm mit veränderlicher Lichtdurchlässigkeit für Kopfbedeckung
EP2312373B1 (de) Anzeigegerät mit optischem Fenster mit einstellbarer Transmission
US7158095B2 (en) Visual display system for displaying virtual images onto a field of vision
EP1730579B1 (de) Transparentes und polarisierendes brillenglas mit einer mit einem schräg orientierten polarisationsfilter assoziierten zone
EP0216692A2 (de) Windschutzscheibe mit einem speziellen Richtungsreflektor um optische Signale in das Gesichtsfeld des Fahrers zu bringen
FR3090140A1 (fr) Dispositif de projection
FR2675911A1 (fr) Melangeur optique pour visuel de casque.
EP3208526B1 (de) Lichtanlage zur beleuchtung und/oder signalisierung für kraftfahrzeug
EP2466361B1 (de) Head-up-Anzeige für ein Schienenfahrzeug
EP3011381A1 (de) Blickfeldanzeige für nachtsichtbrillen
EP3602205B1 (de) Skeleton-armbanduhr mit fotochromischer zifferblatt
FR2558236A1 (fr) Perfectionnemens aux projecteurs automobiles a faisceau coupe
FR2650083A1 (fr) Verre oculaire destine a equiper une lunette binoculaire de protecti on des yeux contre les rayonnements solaires nocifs
GB2249766A (en) Instrument display
EP0603092B1 (de) Auf einen Helm montiertes Anzeigesystem
CN109324412B (zh) 消杂光器件和车载平视型显示器及其防尘盖
CA1290882C (fr) Procede de contre-mesure dans le domaine de la designation d'objectifs et de la telemetrie laser, materiaux et dispositifs pour la mise en oeuvre dudit procede de contre-mesure
EP0352153B1 (de) Anzeigevorrichtung, um Informationen auf der Windschutzscheibe eines Fahrzeugs, insbesondere eines Automobils darzustellen
FR3056767A1 (fr) Module d'affichage pour habitacle de vehicule et module de commande associe
US20030058540A1 (en) Vehicle rear-view mirror and method of making same
CN205157826U (zh) 一种防眩膜
FR3075404A1 (fr) Dispositif de generation d'images et afficheur tete haute associe
US11809025B2 (en) Anti-blue-ray UV optical lens device with chroma enhancement
US20170307794A1 (en) Optical filter for improving visual response to amber and red led emissions
EP0599759A1 (de) An einem Helm montierte Anzeige

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES FR GB IT NL SE

17P Request for examination filed

Effective date: 19951018

17Q First examination report despatched

Effective date: 19970326

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES FR GB IT NL SE

REF Corresponds to:

Ref document number: 69418434

Country of ref document: DE

Date of ref document: 19990617

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990714

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2132360

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19991111

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19991117

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19991214

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19991231

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001231

BERE Be: lapsed

Owner name: SEXTANT AVIONIQUE

Effective date: 20001231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010701

EUG Se: european patent has lapsed

Ref document number: 94402802.6

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20010701

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011119

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20011122

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011207

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051206

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20091221

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110103