WO2015186149A1 - Dispositif adapté à signaler visuellement la présence de rayonnements ionisants dans un environnement entourant le dispositif - Google Patents

Dispositif adapté à signaler visuellement la présence de rayonnements ionisants dans un environnement entourant le dispositif Download PDF

Info

Publication number
WO2015186149A1
WO2015186149A1 PCT/IT2014/000171 IT2014000171W WO2015186149A1 WO 2015186149 A1 WO2015186149 A1 WO 2015186149A1 IT 2014000171 W IT2014000171 W IT 2014000171W WO 2015186149 A1 WO2015186149 A1 WO 2015186149A1
Authority
WO
WIPO (PCT)
Prior art keywords
intensity
filtering
detector
ionizing radiations
signaling
Prior art date
Application number
PCT/IT2014/000171
Other languages
English (en)
Inventor
Vito Domenico PERCOCO
Original Assignee
Societa Meridionale Radioprotezione 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 Societa Meridionale Radioprotezione Sas filed Critical Societa Meridionale Radioprotezione Sas
Publication of WO2015186149A1 publication Critical patent/WO2015186149A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B2027/0178—Eyeglass type

Definitions

  • Device suitable for visually signaling the presence of ionizing radiations in an environment surrounding the device
  • the present invention refers to the field of devices suitable for signaling the presence of ionizing radiations in a specific environment.
  • ionizing radiation it is intended a corpuscular or electromagnetic radiation capable of ionizing a substance with which the radiation comes to interact, i.e. a substance subjected to the action of the radiation.
  • the corpuscular ionizing radiations there are the propagations of a and ⁇ particles, and among the electromagnetic ionizing radiations there are the ⁇ rays and the X rays.
  • the present invention refers to a device of the aforesaid type in which the signaling of the presence of ionizing radiations is visually carried out by means of optical transparency means that can be varied in a controlled manner, such as optical filters comprising a layer of liquid crystals with trans- parency that can vary electrically.
  • the ionizing radiations have over the years found application in an increasing number of technical fields, such that they have become a physical agent of enormous importance in modern life.
  • the Mature of these radiations is such that when they interact with biological tissues, they can cause damage of various type, even extremely serious damage such as that of genetic nature (i.e. chromosome aberrations and mutations).
  • the extent of the damage caused depends both on the type of radiation to which a person is exposed, and on the intensity and duration of the exposure. For this reason, those who operate in a so-called "radioactive" environment (i.e. in which ionizing radiations are propagated) must limit the duration of exposure to the radiations as much as possible, and must wear suitable garments acting as protective screens.
  • those who operate in a radioactive environment, or one that is potentially radioactive can be provided with a device suitable for signaling the possible presence of ionizing radiations. Indeed, the latter are not visible, hence for detecting the presence thereof it is neces- sary to use suitable devices capable of interacting with the ionizing radiations in a manner so as to be able to detect the presence and measure the intensity thereof.
  • a device suitable for signaling the possible presence of ionizing radiations are not visible, hence for detecting the presence thereof it is neces- sary to use suitable devices capable of interacting with the ionizing radiations in a manner so as to be able to detect the presence and measure the intensity thereof.
  • the devices belonging to this category the most well-known is the Geiger counter.
  • the possible presence of ionizing radiations is signaled to a user of the device in two ways: visually, by means of a pointer movable on a graduated scale, and acoustically, by means of the intermittent emission of a noise whose frequency is proportional to the intensity of the radiations present.
  • the acoustic signal might not always be perceptible by a person operating in a radioactive environment (for example, because the person wears other apparatuses that protect the hearing or due to the presence of other noises in the environment where the person operates).
  • the above visual signal is not immediately perceptible by a user of the device since said user would be obliged to read that reported on the graduated scale in order to comprehend the presence and/or extent of the radiation exposure, which he cannot always do with continuity since he may be engaged in other activities (for example, a surgeon in an operating room).
  • Object of the present invention is to overcome the aforesaid drawbacks and indicate a device suitable for signaling the presence of ionizing radiations with a visual signal that js immediately perceptible.
  • Subject of the present invention is a device for signaling the presence of ionizing radiations in an environment surrounding the device, the device comprising:
  • detector means means suitable for verifying the possible presence of ionizing radiations and indicated hereinbelow in the present description with the expression "detector means", the detector means being exposed to said environment, i.e. being subjected to the action of the radiations possible present in said environment;
  • signaling means suitable for sending at least one signal to a user of the device
  • the control means being suitable for driving the signaling means so as to send said signal to the user of the device when the detector means verify the presence of ionizing radiations;
  • the signaling means comprise means suitable for at least partially filtering a light radiation crossing through the same, the control means being suitable for driving filtering means in a manner so as to at least partially filter said light radiation when the detector means verify the presence of the ionizing radiations.
  • the filtering means are means that can be traversed by a light radiation and are suitable for stopping the passage of said light radiation through them, at least partially and in a controlled manner.
  • the filtering means are means with optical transparency that can vary in a controlled manner.
  • the sig- nal sent to the user of the device, object of the invention therefore consists of an alteration of the light radiation crossing through the filtering means, and visually perceived by the user.
  • the filtering means can comprise polarizer filters or liquid crystal filters.
  • polarizer filter it is intended an optical filter suitable for generating phenomena of polarization of the light radiation that traverses it; with the expression “liquid crystal filter”, it is intended an optical filter (present, by way of example, in the “LCD” or liquid crystal screens) comprising a liquid crystal layer with optical transparency that can electrically vary in a controlled manner.
  • the light radiation that crosses through the filtering means can be solar light or artificial light already diffused in the environment (as, for example, occurs for the liquid crystal filter present in the LCD screens of "reflective” type), or it can be emitted for such purpose by a light source (also indicated with the expression “emitter means") comprised in the device that is the object of the invention (as, for example, occurs for the liquid crystal filter present in the LCD screens of "transmissive” type").
  • the detector means are suitable for measuring the intensity of the ionizing radiation, the filtering means being suitable for varying the intensity of the light radiation exiting therefrom, the control means being suitable for driving the filtering means in a manner so as to vary said intensity of the light radiation as a function of the intensity of the ionizing radiations.
  • the intensity of an ionizing radiation can be measured in Sievert, i.e. the unit of measure, in the SI international system, of the biologi- cally effective dose of radioactivity.
  • Sievert i.e. the unit of measure, in the SI international system, of the biologi- cally effective dose of radioactivity.
  • One Sievert corresponds with the absorbed dose of any one ionizing radiation having the same biological effectiveness of a Gray (i.e. a unit of measure indicating the quantity of X rays that transfer a Joule of energy for each Kg of traversed substance).
  • the detector means are suitable for measuring the intensity of the ionizing radiation, the filtering means being suitable for preventing the passage of the light radiation at at least one wavelength interval, said wavelength interval having two ends that can be varied by the control means, the control means being suitable for driving the filtering means in a manner so as to vary said ends as a function of the intensity of the ionizing radiations.
  • the optical transparency of the filtering means can vary in terms of intensity of the light radiation that is able to cross through the filtering means (i.e. exiting from the same), and/or in terms of wavelength interval of the light radiation (i.e. of the visible spectrum) to which the filtering means prevent (or allow) the passage.
  • This is possible by virtue of the fact that, as known, light radiation has a wavelength nearly comprised between 0.4 ⁇ and 0.7 ⁇ .
  • the filtering means comprise, for example, polarizer filters or liquid crystal filters and the control means are able to vary the intensity of the light radiation crossing through the aforesaid filters.
  • the filtering means comprise, for example, optical reflection or absorption filters and the control means are capable of varying the wave- length interval of the visible spectrum with regard to which the aforesaid filters stop (or allow) the passage.
  • the filtering means can also comprise a so-called "plasma” filter (present, by way of example, in the "PDP” or plasma screens), i.e. a filter comprising two glass panels that delimit a thin layer subdivided into cells containing a mixture of noble gases.
  • a plasma filter presents, by way of example, in the "PDP” or plasma screens
  • the plasma filters can be substantially transparent.
  • the plasma layer at least partially prevents the passage therethrough of the light radiation diffused in the environment, thus acting as a filter.
  • the signal sent to the user of the device that is the object of invention consists of an alteration of the light radiation crossing through the filtering means. With respect to the reading of a value indicated by a pointer on a graduated scale, the variation of the light radiation caused by the filtering means can be more readily/immediately perceived by said user.
  • control means control the filtering means by reducing the intensity of the light radiation crossing through them (i.e. by making them appear increasingly darker) with the increase of the intensity of ionizing radiations possibly present in the environment.
  • control means can control the filtering means in a manner such that they appear to said user as a monochromatic screen whose color varies over a gray scale, or a chromatic screen of graduatable color.
  • the filtering means preferably appear white in the absence of ionizing radiations, and increasingly gray (until becom- ing black) with the increase of the intensity of the ionizing radiations present in the environment.
  • the device in order for the visual signal communicated by the signaling means to be perceived by a user of the device, there is no need to read anything, nor is it necessary to be able to view the position of the pointer with respect to a graduated scale.
  • the filtering means can be connected to a user of the device that is the object of the invention in a manner so as to constantly lie in the binocular visual field of said user.
  • An object lies in the binocular visual field of a person when it is visible, by said person, with one or both eyes.
  • An object lies constantly in the visual field of a person when it is always visible by the latter, regardless of the spatial orientation of the head.
  • the apical part of the nose i.e. that at the greater alar cartilage
  • An object connected to a person at one part of the body thereof, such that the object is visible by said person only when the head thereof is in a specific position, is therefore not an object connected in a manner so as to constantly lie in the visual field of said person.
  • an object connected at the pelvis is only visible when the head is tilted towards the pelvis and therefore does not constantly lie in the visual field.
  • an object connected to a person at one part of the body thereof, such that the object is visible by said person only after having completed a spe- cific movement of said part of the body is not an object connected in a manner so as to lie constantly in the visual field of said person.
  • an objected connected at a wrist is only visible when the head is tilted towards the wrist, or conversely only after having lifted the wrist in a manner such that the object lies in the visual field of the person.
  • the filtering means are connected to the user of the device that is the object of the invention in a manner such that they are always vis- ible by such person, the user does not have to worry about continuously consulting the filtering means since - given that they are constantly lying within his visual field - they are continuously unconsciously monitored, even if they are not brought into focus.
  • the signaling device comprises means suitable for connecting the filtering means to a user of the device in a manner such that the latter lie in front of at least one eye of said user.
  • the filtering means are shaped as a monocle, such that they can be fit in one eye socket of said user.
  • connection means comprise a monocle and the filtering means can be connected to said monocle.
  • the filtering means can be connected to the monocle in a manner so as to be superimposed thereon.
  • connection means comprise a frame of a pair of eyeglasses and the filtering means can be connected to said frame.
  • the device that is the object of the invention comprises a pair of eyeglasses not for sight purposes whose lenses correspond with the filtering means and whose frame corresponds with the connection means.
  • the filtering means are shaped, by way of example, as "superimposable lenses", i.e. they can be connected to the eyeglasses in a manner so as to superimposed on the lenses "for seeing".
  • the latter comprise a pair of nosepieces abuttable against the nose respectively at the two lateral cartilages, and a pair of temples abuttable, at one end thereof, against the junction of each auricle at the head.
  • Said abutments achieve the connection be- tween the filtering means and the user of the device.
  • the detector means and/or the control means can be connected to said frame.
  • the eyeglasses frame advantageously acts as a means for connecting, to said user, also the remaining components of the device that is the object of the invention.
  • FIG. 1 shows, in perspective view, a signaling device according to the present invention
  • FIG. 1 shows, in perspective view, an alternative embodiment of the device of figure 1.
  • Figure 1 shows a device 1 for signaling the presence of ionizing radiations in an environment surrounding the device 1.
  • the latter comprises a liquid crystal screen 2 integrated in a monitor 3, to which the following are connected: a detector 4 capable of verifying the possible presence of ionizing radiations in the environment surrounding it, and a processing unit 5 operatively connected to the screen 2 and to the detector 4 so as to be able to impart commands to the screen 2 as a function of that detected by the detector 4.
  • the monitor 3 is a nearly rectangular parallelepiped and has a thickness clearly less than its length and width.
  • the monitor 3 comprises a liquid crystal layer acting as an optical filter with transparency that can electri- cally vary in a controlled manner.
  • the liquid crystals are subdivided into cells, at each of which the crystals are oriented as a function of an electric or magnetic field applied thereto. In such a manner, it is possible to modulate the optical properties of each cell and thus the transparency of the filter.
  • by suitably applying an electric or magnetic field to the liquid crystals it is possible to regulate the intensity of the light radiation capable of crossing through the filter (i.e. "exiting" from the screen 2).
  • the liquid crystal filters are of substantially known type, hence they will not be further discussed in detail herein.
  • the liquid crystal filter can be traversed by a light radiation which, for example, can consist of solar light or artificial light already present in the environment and suitably reflected in a manner so as to cross through the filter, or it can consist of radiation artificially emitted for such purpose by a light source (not visible in the figures) integrated in the screen 2.
  • a light radiation which, for example, can consist of solar light or artificial light already present in the environment and suitably reflected in a manner so as to cross through the filter, or it can consist of radiation artificially emitted for such purpose by a light source (not visible in the figures) integrated in the screen 2.
  • the screen 2 is of "reflective" type
  • the second case it is of "transmissive" type.
  • the detector 4 functions in a manner analogous to a common apparatus that allows measuring the intensity of ionizing radiations that may propagate in a specific environment.
  • a common apparatus that allows measuring the intensity of ionizing radiations that may propagate in a specific environment.
  • the Geiger counters and the scintillation counters there are the Geiger counters and the scintillation counters. Given that these apparatuses are of substantially known type, further details with regard thereto will not be provided hereinbelow.
  • the detector 4 and the processing unit 5 are preferably connected to the monitor 3 at two respective faces thereof, opposite two sides of the screen 2.
  • the monitor 3 supplies power to the screen 2 as well as to the detector 4 and processing unit 5.
  • the processing unit 5 is connected to the screen 2 and to the detector 4 such that it is able to regulate the transparency of the liquid crystal filter of the screen 2 as a function of the intensity of the ionizing radiations possibly detected by the detector 4.
  • the processing unit 5 commands the screen 2 in a manner so as to reduce the intensity of the light radiation crossing through the liquid crystal filter (i.e. in a manner such that the latter appears increasingly darker) with the increase of the intensity of ionizing radiations detected by the detector 4.
  • the processing unit 5 can command the screen 2 in a manner such that it appears as a monochromatic screen whose color varies over a gray scale. In particular, the screen can appear white in the absence of ionizing radiations, and increasingly grayer (until becoming black) with the increase of the intensity of ionizing radiations detected by the detector 4.
  • the liquid crystal filter present in the screen 2 therefore acts as a means for visually signaling both the possible presence of ionizing radiations in the envi- ronment surrounding the monitor 3, and the intensity of said radiations.
  • the processing unit 5 can control the screen 2 in a manner such that the liquid crystal filter transmits a light radiation only when the detector 4 detects ionizing radiations of intensity less than a specific limit value, and is completely opaque/dark when ionizing radiations of in- tensity equal to or greater than said limit value are detected.
  • liquid crystal filter present in the screen 2 only acts as a means for visually signaling the possible presence of ionizing radiations in the environment surrounding the monitor 3, of intensity equal to or greater than said limit value.
  • the processing unit 5 can regulate the transparency of only a single portion of the filter.
  • the remaining portion of the liquid crystal filter (and hence of the screen 2) can be used for other purposes.
  • the monitor 3 can function as a common monitor (e.g. a television).
  • the monitor 3 can function entirely as a common monitor when the processing unit 5 is turned off.
  • FIG. 2 shows a device 10 that constitutes an alternative embodiment of the device 1 of figure 1.
  • the device 10 comprises a pair of eyeglasses 11 including a pair of lenses 12 supported by a frame 13.
  • At least one of the two lenses 12 comprises a liquid crystal filter analogous to that described in reference to the screen 2 of the device 1 , and means suitable for applying, to the liquid crystals of the filter, a suitable electric or magnetic field that causes a variation of the transparency of the filter.
  • Said means suitable for applying an electric or magnetic field comprise, by way of example, a thin layer of electrodes applied to one or both lenses (not visible in the figure).
  • the device 10 further comprises a detector 14 and a processing unit 15 respectively analogous to the detector 4 and to the processing unit 5 of the device 1 , and respectively connected to the frame 13, by way of example, above the lenses 12 and at one of the two temples of the frame 13.
  • the detector 14 is therefore able to verify the possible presence of ionizing radiations in the environment surrounding the eyeglasses 11
  • the processing unit 15 is operative ⁇ connected to the stimulation means and to the detector 14 so as to be able to impart commands to said filter as a function of that detected by the detector 14.
  • the liquid crystal filter of the device 10 being comprised in at least one of the lenses 12, constantly lies in the binocular visual field of a person (not visible in the figure) who wears the eyeglasses 1 1.
  • Said filter analogous to the lenses 12, can be crossed by a light radiation which, for example, can consist of solar or artificial light already present in the environment.
  • one or both lenses 12 can be formed by the liquid crystal filter, or the latter can be superimposed on one or both lenses 12.
  • the detector 14 comprises an electric accumulator by means of which not only is the same detector 14 power supplied, but also the processing unit 15 and the filter stimulation means are power supplied. Rather than being connected to the frame 13, the detector 14 and the processing unit 15 could be connected to the person who wears the eyeglasses 11 at other parts of the body, such as on the chest.
  • the processing unit 15 is connected to the detector 14 and to the stimulation means so as to be able to regulate the transparency of the liquid crystal filter as a function of the intensity of the ionizing radiations possibly detected by the detector 14.
  • the processing unit 15 com- mands the stimulation means in a manner so as to reduce the intensity of the light radiation crossing through the filter (i.e.
  • the liquid crystal filter present in the lenses 12 therefore acts as means for visually signaling both the possible pres- ence of ionizing radiations in the environment surrounding the eyeglasses 11 , and the intensity of said radiations.
  • the processing unit 15 can command the filter stimulation means in a manner such that the latter transmits a light radiation only when the detector 14 detects ionizing radiations of intensity less than a specific limit value, and is completely opaque/dark when ionizing radiations of intensity equal to or greater than said limit value are detected.
  • the liquid crystal filter present in the lenses 12 only acts as means for visually signaling the possible presence of ionizing radiations in the environment surrounding the eyeglasses 11 , of intensity equal to or greater than said limit value.
  • the filter can match or cover only a portion of one or both lenses 12.
  • the remaining portion of the lenses 12 can be used for other purposes.
  • the lenses 12 could act as graduated lenses.
  • the lenses 12 could act entirely as graduated lenses when the processing unit 15 is turned off.
  • the filtering means can be connected to a person in a manner so as to lie in front of at least one eye of said person.
  • the device described, in this alternative embodiment is not limited to the aforesaid example but can comprise any one means suitable for connecting the filtering means to a person in a manner such that the filtering means lie constantly in the binocular visual field of such person.

Abstract

La présente invention se rapporte à un dispositif adapté à signaler la présence de rayonnements ionisants dans un environnement entourant un tel dispositif. Le dispositif de signalisation comprend un détecteur (14) pouvant vérifier la présence, dans ledit environnement, de rayonnements ionisants et mesurer leurs intensités. Le détecteur est connecté à une unité (15) de traitement qui, en fonction de ce que le détecteur détecte, commande de façon appropriée l'actionnement d'un moyen adapté à signaler visuellement, à un utilisateur du dispositif, la présence éventuelle de rayonnements ionisants. Le moyen de signalisation comprend un filtre à cristaux liquides dont la transparence peut varier électriquement et de manière commandée. Plus les rayonnements détectés sont intenses, plus le filtre devient opaque/sombre. Dans un premier mode de réalisation du dispositif qui est l'objet de l'invention, le filtre à cristaux liquides est une partie intégrée d'un moniteur à cristaux liquides à laquelle le détecteur et l'unité de traitement sont connectés. Dans un second mode de réalisation, le filtre à cristaux liquides est situé dans au moins une lentille d'une paire de lunettes.
PCT/IT2014/000171 2014-06-05 2014-06-25 Dispositif adapté à signaler visuellement la présence de rayonnements ionisants dans un environnement entourant le dispositif WO2015186149A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20141029 2014-06-05
ITMI2014A001029 2014-06-05

Publications (1)

Publication Number Publication Date
WO2015186149A1 true WO2015186149A1 (fr) 2015-12-10

Family

ID=51398701

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2014/000171 WO2015186149A1 (fr) 2014-06-05 2014-06-25 Dispositif adapté à signaler visuellement la présence de rayonnements ionisants dans un environnement entourant le dispositif

Country Status (1)

Country Link
WO (1) WO2015186149A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939345A (en) * 1974-12-23 1976-02-17 Xonics, Inc. Liquid crystal imaging of radiograms
EP0596488A1 (fr) * 1992-11-04 1994-05-11 Reliant Technologies, Inc. Lunettes de soleil à cristaux liquides indiquantes la surexposition à la radiation UV
DE19744079A1 (de) * 1997-10-06 1999-04-08 Woehlk Contact Linsen Gmbh Ophthalmische Linse
US20090059159A1 (en) * 2004-04-15 2009-03-05 Howell Thomas A Eyewear with radiation detection system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939345A (en) * 1974-12-23 1976-02-17 Xonics, Inc. Liquid crystal imaging of radiograms
EP0596488A1 (fr) * 1992-11-04 1994-05-11 Reliant Technologies, Inc. Lunettes de soleil à cristaux liquides indiquantes la surexposition à la radiation UV
DE19744079A1 (de) * 1997-10-06 1999-04-08 Woehlk Contact Linsen Gmbh Ophthalmische Linse
US20090059159A1 (en) * 2004-04-15 2009-03-05 Howell Thomas A Eyewear with radiation detection system

Similar Documents

Publication Publication Date Title
US7150047B2 (en) Indicator layout on an auto-darkening lens for use in welding
KR102436963B1 (ko) 근시 예방 물품
CN110740714B (zh) 带有包括可切换遮光器阵列的自动变暗滤光器的视力保护性头戴装置
EP2236074B1 (fr) Affichage visuel avec illuminateurs pour le suivi du regard
US20070089215A1 (en) Bifocal magnifier plate for use in welding
JP2000512520A (ja) 対話型光フィールド装置
KR20160063330A (ko) 안경 렌즈용 적응형 광학 필터
CA2971645C (fr) Systeme et procede de gestion d'un verre actif
JP2010534350A (ja) 光誘導性損傷から網膜を保護するための方法およびシステム
US10345622B2 (en) Management system and method of an active device
US20100007873A1 (en) Visualization of the ultraviolet radiation reflecting power of a glasses lens
WO2015186149A1 (fr) Dispositif adapté à signaler visuellement la présence de rayonnements ionisants dans un environnement entourant le dispositif
KR102234008B1 (ko) 안경렌즈의 유해 광선 차단여부 검사장치
JP7260868B2 (ja) 放射線計測体及び放射線被曝量計測装置
US11586056B2 (en) Spectacle lens comprising an activable optical filter and optical equipment comprising such spectacle lens
US11249333B2 (en) Optical processing apparatus and near-eye display device
US20130038832A1 (en) Device for demonstrating and testing the efficacy of an antireflection treatment of an ophthalmic lens
Cavatorta et al. A survey of sources of incoherent artificial optical radiation in a hospital environment in accordance with European Directive 2006/25/EC: evaluation of the related exposure risk
JP6900999B2 (ja) 業務支援システム及び保護メガネ
JP5864794B1 (ja) 視能訓練装置
RU118786U1 (ru) Нашлемная система индикации
Yang et al. Contrast sensitivity and comfort levels with different types of polarised glasses under steady glare
CA2972510C (fr) Systeme et procede de gestion de dispositif actif
RU12777U1 (ru) Офтальмологический компактный лазерный спекл-стимулятор
JPH08201736A (ja) 自動光遮断眼鏡

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14761420

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14761420

Country of ref document: EP

Kind code of ref document: A1