WO2015044354A1 - Filtre optique adaptatif pour verre de lunettes - Google Patents
Filtre optique adaptatif pour verre de lunettes Download PDFInfo
- Publication number
- WO2015044354A1 WO2015044354A1 PCT/EP2014/070631 EP2014070631W WO2015044354A1 WO 2015044354 A1 WO2015044354 A1 WO 2015044354A1 EP 2014070631 W EP2014070631 W EP 2014070631W WO 2015044354 A1 WO2015044354 A1 WO 2015044354A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical filter
- adaptive optical
- transmission coefficient
- light
- value
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/101—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having an electro-optical light valve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/02—Microstructural systems; Auxiliary parts of microstructural devices or systems containing distinct electrical or optical devices of particular relevance for their function, e.g. microelectro-mechanical systems [MEMS]
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/105—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having inhomogeneously distributed colouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/04—Optical MEMS
- B81B2201/047—Optical MEMS not provided for in B81B2201/042 - B81B2201/045
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/18—Cellular lens surfaces
Definitions
- the present invention relates to optical filters, used as optical shutters for controlling the attenuation of a light intensity, adaptively in response to external conditions or to the control of a user.
- the invention may advantageously be implemented in glare protection devices, such as sunglasses.
- Such glasses allow the user to adopt a vision position, spontaneously or naturally, allowing vision through the lower zone, and a position of voluntary vision, inclining more or less the head downward, allowing:
- the vision through the upper zone which strongly attenuates incident or reflected polarized lights from distant sources
- - the vision through the central zone to modulate at the option of the wearer of glasses the degree of attenuation of the sources situated in a distant field
- the documents EP 0 341 519, FR 2 693 562 and FR 2 975 792 disclose glasses whose frame comprises a photosensitive sensor and whose glasses comprise a layer of liquid crystals, the sensor emitting a signal increasing function of the luminous intensity which reached, an electronic circuit driving the liquid crystal such that the transmittance of the liquid crystal decreases as the light intensity received by the sensor increases.
- the document FR 2 781 289 discloses glasses whose frame comprises a photosensitive sensor emitting a signal of increasing power as a function of the light intensity which reaches it, an electronic circuit connected to the sensor and emitting an alternating secondary signal of increasing power with the power of the signal emitted by the sensor, and glasses having an electro-optical screen, the electronic circuit varying the frequency of the secondary signal, the increase in light intensity resulting in a reduction of the transmittance of spectacle lenses .
- the document WO 2012/036638 discloses ophthalmic glasses with liquid crystals, whose lenses comprise an upper zone for far vision, a lower zone for near vision, and a variable transparency element.
- near vision mode the lens area for far vision is opacified, and the lens area for near vision is clear or transparent.
- far vision mode the lens areas for far vision and near vision are clear or transparent.
- the purpose of these glasses is to encourage the wearer to use the upper area of the lenses for far vision, and the lower area for near vision, instead of accommodating using the upper area, to heal or prevent myopia. Presentation of the invention
- the present invention is placed in this context and its purpose is to provide an adaptive optical filter, intended in particular to constitute a spectacle lens, capable of having a transmission of almost zero light to prevent glare, and a transmission maximum light, and especially close to 100%, to allow a clear vision in the absence of dazzling source in the field of view, the transition from one transmission state to the other being carried out gradually.
- the subject of the present invention is an adaptive optical filter for spectacle lens, comprising at least two distinct zones (10_M, 10_S), one being located preferentially above the other, each of the zones being defined. by an instantaneous value of at least one optical property, the optical property being preferably the transmission coefficient of the light.
- the optical property (CT) of at least one of the areas (10_M, 10_S) of the adaptive optical filter (10) is variable in time between a maximum value (CTMAX) and a minimum value (CTmin).
- the transmission coefficient of the lower zone is greater than that of the upper zone.
- the light transmission coefficient of at least one of the zones of the adaptive optical filter is variable according to a modulation of pulse width; at least one of the zones of the adaptive optical filter comprises a liquid crystal cell;
- the adaptive optical filter comprises a Mioco-Opto-Electromechanical system; the adaptive optical filter comprises two zones whose light transmission coefficient of each of them is variable in time between a maximum value and a minimum value;
- the light transmission coefficient of one of the zones is a function of the light transmission coefficient of the other zone
- the light transmission coefficient of at least one of the zones of the adaptive optical filter is a function of the duty cycle of the pulse width modulation cycle
- the duty cycle of the pulse width modulation cycle of the light transmittance of one of the zones is a function of the duty cycle of the pulse width modulation cycle of the light transmission coefficient of an adjacent area
- the light transmission coefficient is controlled by a control signal from a photosensitive sensor
- the photosensitive sensor emits a signal whose value is a function of the luminous intensity which it receives from the scene in front of the spectacle wearer;
- the light transmission coefficient is controlled by a manual control signal
- the adaptive optical filter comprises a zone whose light transmittance is constant over time.
- FIG. 1 schematically a perspective view of an adaptive optical filter made according to the present invention
- FIGS. 2A and 2B show schematically a pair of glasses, incorporating two filters made according to the present invention, in two operating states;
- FIGS. 4A and 4B show diagrams of the time evolution of different signals used in the present invention.
- FIG. 5 shows schematically in perspective, on a very large scale, the filter of Figure 1, according to a second embodiment
- FIG. 1 Shown in FIG. 1 is a schematic perspective view of an adaptive optical filter made in accordance with the teachings of the present invention.
- the filter designated as a whole by reference numeral 10, comprises three zones:
- the lower zone 0 I has a fixed transmission coefficient CT
- the upper zone 10_S has a transmission coefficient of the time-varying CT S light under the control of an electrical signal.
- This transmission coefficient CT S can thus take any value between a maximum value CT MAX , for which a maximum quantity of light is transmitted, and a minimum value CT MIN , for which a minimum quantity of light is transmitted.
- the median zone 10_M has a time-varying coefficient of transmission of the light M M CT, so that its instantaneous value is always between the fixed value CT
- FIGS. 2A and 2B show a pair of glasses, each of which incorporates at least one filter made according to the present invention, in two operating states. We see :
- a pair of spectacles each of whose glasses comprises a lower zone 0 I, a median zone 10_M, and an upper zone 10_S, and
- FIGS. 2A and 3A clearly show that the lower zone 0 I has a transmission coefficient CT
- the upper zone 10_S has a transmission coefficient CT S constant over the entire height of this upper zone 10_S, and CT value S less than the value CT, of the transmission coefficient of the lower zone 0 I.
- CT S of the transmission coefficient of the upper zone 10_S is equal to the minimum value CT min .
- the median zone 10_M has a variable transmission coefficient CT M , the value of which lies between the values of the transmission coefficients CT
- CT M the transmission coefficient
- the instantaneous value of CT M may be equal at any instant to the arithmetic mean of the values CT, and CT S.
- the transmission coefficients CT S of the upper zone 10_S and CT M of the median zone 10_M are variable in time, so that:
- the transmission coefficient of the light CT S of the upper zone 10_S is variable in time, and can take any value between maximum value CT MAX , for which a maximum quantity of light is transmitted, and a minimum value CT MIN , for which a minimum quantity of light is transmitted, and
- the transmission coefficient of the CT M light of the median zone 10_M is constantly between:
- the transmission coefficient of the light CT M being for example equal to the arithmetic mean of the constant values CT
- the light transmission coefficient CT S has its maximum value CTMAX, and that
- the light transmission coefficient CT M is still between the new value CT S of the transmission coefficient of the upper zone 10_S and the constant value CT
- CT MAX a maximum value permitted by the technology used to vary this transmission coefficient in order to allow the spectacle wearer to observe the far field in the scene in front of him
- constant, of maximum value, to allow the spectacle wearer to perfectly distinguish the objects in the near field in front of him
- a light transmission coefficient CT M in its median zone 10_M, a light transmission coefficient CT M , the value of which is at all times between the constant value CT
- liquid crystal cells as constituent materials of spectacle lenses, controlled by an electrical signal.
- a liquid crystal cell comprises two polarizing filters, a polarizer and an analyzer, enclosing a layer of liquid crystal.
- Transparent electrodes are deposited on the faces of the polarizing filters facing the liquid crystal layer, and the application of an electric field between these two electrodes makes it possible to switch the polarization state of the liquid crystal layer, and therefore to modify the coefficient of transmission of light by the cell, between a zero value, for which the cell is opaque, and a maximum value, for which the cell has a maximum transparency.
- a digital signal that is to say an alternating signal, preferably in PWM pulse width modulation (for the English expression “Pulse Width Modulation"), at a predetermined frequency, in accordance with the diagrams of Figures 4A and 4B.
- the electrical control signal may be derived from a manual control (not shown), actuated directly by the spectacle wearer, to control the transmission coefficient of the upper zone 10_S.
- the electrical control signal may be issued from a photosensitive sensor (not shown), emitting a signal whose value is a function of the light intensity it receives from the scene in front of the spectacle wearer, and associated with a circuit which converts this signal into a digital control signal S C encoded in PWM, for automatically controlling the transmission coefficient of the filter comprising a zone of the spectacle lens, and in particular of its upper zone 1 0_S, as a function of the luminosity emanating from the scene in front of the eyeglass wearer.
- this control signal S C varies between a value S CMAX for a duration t-, and a value S Cm in for a duration t 2 , the sum of the durations t- and t 2 defining the period T of the alternating signal S C , which is further characterized by a duty cycle a.
- the duty cycle signal S C thus appears as a direct function of either the light intensity received by the photosensitive sensor or the set value set by the spectacle wearer.
- the control signal S C is represented in FIG. 4A,
- This control signal S c then drives the transmission coefficient of the upper zone 10_S of spectacle lenses 10.
- the transmission coefficient CT S varies, in response to the signal S c , between a value CT MAX during the duration t-, and a value CT min during the duration t 2 , with the same duty cycle has the signal S c and the same frequency v.
- the CT MAX value is that for which the spectacle lenses 10 have their maximum transparency. In most cases, liquid crystal displays have this state in the absence of any electrical excitation, that is to say in the state of rest, and are opaque only under the effect of a field electric. In these cases, the CT MAX value corresponds to a minimum excitation of the liquid crystals constituting the spectacle lenses 10.
- the state of rest of a liquid crystal screen may be one where they exhibit their maximum opacity, becoming transparent only under the effect of an electric field.
- the CT MAX value corresponds to a maximum excitation of the liquid crystals constituting the upper zone 10_S of spectacle lenses 10.
- FIG. 4B thus represents the variation of the transmission coefficient CT S of the upper zone 10_S of spectacle lenses 10, and not the variation of the excitation signal of these spectacle lenses.
- the spectacle wearer can therefore observe the scene in front of him through glasses glasses 10, whose upper zone 10_S has an adjusted transmission coefficient:
- the automatic or manual variation of the transmission coefficient CT S of the upper zone 10_S of spectacle lenses 10 is thus obtained by a succession of states of maximum and minimum transparency of these spectacle lenses, at a frequency v and with a duty cycle. at .
- the frequency v is chosen high enough to avoid any flicker phenomenon for the wearer of glasses.
- the frequency v will for example be greater than 100 Hz to fully benefit from the phenomenon of retinal persistence.
- the automatic or manual variation of the transmission coefficient CT M of the median zone 10_M of the spectacle lenses 10 is obtained in the same way, by a succession of states of maximum and minimum transparency of this zone 10_M of the spectacle lenses 10, to the same frequency v.
- the duty cycle ( CT M ) of the transmission coefficient CT M of the median zone 10_M is a simple function of the cyclic ratio (CT S ) of the transmission coefficient CT S of the median zone 10_S, for example:
- the lower zone 0 I does not comprise liquid crystals and is constituted for example by a simple transparent glass, the value of the transmission coefficient CT
- this area can then reach a value close to 100%.
- adaptive optical filter for spectacle lens comprising at least two zones
- the transmission coefficient of the adaptive optical filter is adjusted in real time according to the brightness of the scene observed by the wearer of glasses: plus the brightness is higher, the more the adaptive optical filter is obscured, and vice versa.
- a third zone 10_M in which the light transmission coefficient CT M is variable, its value remaining at any moment between the values of the transmission coefficients. adjacent areas 0 I and 10_S.
- fixed and minimal, and the upper zone 10_S with variable transmission coefficient CT S each intermediate zone having a light transmission coefficient comprised between the transmission coefficients of the adjacent zones.
- Micro-Opto-Electromechanical systems also known by the acronym MOEMS or MEMS
- MOEMS Micro-Opto-Electromechanical systems
- FIG. 5 Such systems are described, for example, in US Pat. No. 4,248,501 or US Pat. No. 5,784,189, to which reference may be made.
- Such systems are also controllable by an electronic signal, and their light transmittance can be controlled at frequencies and with cyclic ratios compatible with the present invention.
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Liquid Crystal (AREA)
- Eyeglasses (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020167007708A KR20160063330A (ko) | 2013-09-26 | 2014-09-26 | 안경 렌즈용 적응형 광학 필터 |
EP14777072.1A EP3049862A1 (fr) | 2013-09-26 | 2014-09-26 | Filtre optique adaptatif pour verre de lunettes |
JP2016517294A JP6502328B2 (ja) | 2013-09-26 | 2014-09-26 | 眼鏡レンズおよび眼鏡レンズシステム |
US14/912,235 US9915831B2 (en) | 2013-09-26 | 2014-09-26 | Adaptive optical filter for spectacle lenses |
CN201480053054.2A CN105579894A (zh) | 2013-09-26 | 2014-09-26 | 用于眼镜镜片的自适应光学滤波器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1359258 | 2013-09-26 | ||
FR1359258A FR3011095B1 (fr) | 2013-09-26 | 2013-09-26 | Filtre optique adaptatif pour verre de lunettes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015044354A1 true WO2015044354A1 (fr) | 2015-04-02 |
Family
ID=49551683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/070631 WO2015044354A1 (fr) | 2013-09-26 | 2014-09-26 | Filtre optique adaptatif pour verre de lunettes |
Country Status (7)
Country | Link |
---|---|
US (1) | US9915831B2 (fr) |
EP (1) | EP3049862A1 (fr) |
JP (1) | JP6502328B2 (fr) |
KR (1) | KR20160063330A (fr) |
CN (1) | CN105579894A (fr) |
FR (1) | FR3011095B1 (fr) |
WO (1) | WO2015044354A1 (fr) |
Cited By (1)
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WO2017155653A1 (fr) * | 2016-03-07 | 2017-09-14 | Sergio Maggi | Appareil pour améliorer l'acuité visuelle dans des points d'intérêt du champ visuel |
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2014
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- 2014-09-26 WO PCT/EP2014/070631 patent/WO2015044354A1/fr active Application Filing
- 2014-09-26 CN CN201480053054.2A patent/CN105579894A/zh active Pending
- 2014-09-26 JP JP2016517294A patent/JP6502328B2/ja not_active Expired - Fee Related
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WO2017155653A1 (fr) * | 2016-03-07 | 2017-09-14 | Sergio Maggi | Appareil pour améliorer l'acuité visuelle dans des points d'intérêt du champ visuel |
US10120205B2 (en) | 2016-03-07 | 2018-11-06 | Sergio Maggi | Apparatus for improving vision acuity in points of interest of the visual field |
US10345624B2 (en) | 2016-03-07 | 2019-07-09 | Sergio Maggi | Apparatus for improving vision acuity in points of interest of the visual field |
US10545356B2 (en) | 2016-03-07 | 2020-01-28 | Sergio Maggi | Apparatus for improving vision acuity in points of interest of the visual field |
Also Published As
Publication number | Publication date |
---|---|
EP3049862A1 (fr) | 2016-08-03 |
US9915831B2 (en) | 2018-03-13 |
CN105579894A (zh) | 2016-05-11 |
JP6502328B2 (ja) | 2019-04-17 |
US20160202497A1 (en) | 2016-07-14 |
JP2016535289A (ja) | 2016-11-10 |
KR20160063330A (ko) | 2016-06-03 |
FR3011095A1 (fr) | 2015-03-27 |
FR3011095B1 (fr) | 2016-12-23 |
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