FR2736444A1 - Spectacles or clipon lenses for driving - made with three different zones: polarised, graded and neutral - Google Patents

Abstract

The spectacles (or lenses) incorporate a film of synthetic polarising molecules, held in a sandwich between two mineral or organic lens sections and having three different zones - polarised (1), graded (2) and neutral (3). The polarised zone is formed by evenly-distributed polarising molecules, the graded zone has polarised points and neutral areas, and the neutral zone has no polarising molecules. The lens sections between which the polarising film is sandwiched can be made with a thickness and curvature to give optically corrected or neutral lenses.

Description

NEUTRAL DEGRADED POLARIZED GLASSES
The technical field is that of polarized glasses and lenses.

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Prior patents and the state of the art do not specify any method for obtaining a degraded polarizing zone, suppressing chromatic aberrations in white light, in the degraded zone.

The achievements according to these patents are not bearable by the eye, the insistence to use them causes phenomena of uncomfortable retinal permanence, by the presence of ruptures between the zones, by absence of gradient where the presence of parasitic colored chromatic zones.

These patents do not present either a description of the device according to the invention, observable with magnification means.

The device according to the invention, called vision glasses, on glasses glass, consists of mineral or organic glasses, a film of polarizing synthetic molecules, uniformly stretched in the direction and mounted in a plastic sandwich, comprising three types of zones: polarized, degraded and neutral.

The polarized zone has a uniform distribution of polarizing molecules, the neutral zone does not contain any.

The degraded zone, from the polarized zone to the neutral zone, a uniformly degressive distribution of polarizing points or drops with a diameter D such that: 0.0 lllm v: D s 10 zm. The constant thickness between the plastic films of the sandwich is compensated by an optically neutral material.

A "mathematical" light ray, white or polarized light, is not reflected by this drop or polarizing point. Either it crosses it and becomes polarized, or it does not cross it and retains its characteristics.

Quickly here, the polarizing points:
- keep the same polarization orientation as the polarized film from which they are derived.

 - are obtained by punctual heat impacts, laser-type rays or electromagnetic rays, polarized or not, in wavelengths absorbed by the polarizing film, and which group the molecules of the polarizing film referred to in points or polarizing drops with the same orientation of polarization as the starting film; these impacts according to their intensity, release or not a micro space in a ring around these points. The crowns are neutral in polarization.

The gradient therefore consists of a distribution adapted from one zone to another, a polarized film, polarizing points and neutral spaces.

The locations of the various zones in a meniscus may be arbitrary, but for reasons of comfort, safety, symmetry and adjustment, these zones will be horizontal; the polarized zone in the upper part of the glass, the neutral zone in the lower part and therefore, the central degraded zone, a horizontal strip 1 to 2.5 cm wide. These zones are separated from horizontal virtual lines in the position of use of the menisci.

The plastic sandwich of the polarizing molecules is sandwiched between two menisci, mineral or organic, the thickness and curvatures of which are calculated to give the dioptric corrections necessary for corrective eye wear, or zero correction.

For simplified embodiments, the plastic films surrounding the polarizing film are directly the external surfaces of the neutral degraded polarized glass.

For reasons related to the uses and the possible results, the angle of orientation of the axis of polarization, in the same meniscus, for the film and for the points or polarizing drops is, vertical or, corresponding to future adapted uses at night driving, at 45 to the right or at 450 to the left of the vertical in the position of use.

These glasses are therefore polarized degraded sunglasses, eliminating more diurnal glare from solar reflections on horizontal planes. The nighttime use and especially at 45 from the vertical, will allow circulation in indirect lighting conditions, thanks to fixed lights polarized perpendicularly, urban, highway or advertising double message. These combinations of the glasses with the fixed lights eliminate rain, fog and confusion of the traffic lights with the illuminated signs.

The combination with the adapted polarized lighting of the vehicles opposite, will make disappear glare, black holes and all the luminous parasites resulting from the diffusions or diffractions on the drops of water, rain, fog or sails of windshield.

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Presentation of the different figures:
Figures 1 and 2 respectively show a front view and a schematic section of a polarizing glass with its three areas.

1 - polarized
2-degraded
3 - neutral
5 - horizontal virtual lines
FIG. 3 shows an enlargement in front view of the degraded zone (2) in section AA of FIG.
2 - degraded
3 - neutral
4 - polarizing points with or without neutral crown
6 - neutral crown
Figure 4 shows the section of the mounted glass.

 7 and 8 - Plastic film constituting polarized sandwich.

 9 and 10 - Mineral or organic menisci respectively inside and outside.

1 1 - Polarizing film
Embodiments: Structure and operation.

The polarizing film (11), consisting of polarizing synthetic molecules oriented and stretched in the same direction, of regular thickness on the zones (1) and (2), compensated by an optically neutral material for the zone (3) or; of regular thickness on the zone (1), degressive on the zone (2) and of zero thickness for the zone (3), is mounted between two plastic films (7) and (8).

The polarizing sandwich film is assembled between two menisci (9) and (10), mineral or organic, providing dioptric corrections if necessary.

The sandwich of the polarizing molecules, before or after the assembly of the neutral or corrective menisci, is exposed punctually and successively to electromagnetic wave beams, of a suitable diameter, between 1 and 100 clam, in the wavelengths of the spectrum absorbed by the polarizing film, between the horizontal "virtual" lines (5) which separate the polarized zone (1) and the neutral zone (3). This possibly polarized beam perpendicular to the orientation of the target polarizing film, locally raises the temperature of the polarizing film.

The intensity and the emission time of this beam include the polarizing synthetic molecules of the polarizing film (1 1) uniformly distributed, in points or polarized drops (4), of a diameter D, such that 0.01pmg D 40pu, with the same orientation of the polarization axis as the target film.

The polarizing synthetic molecules, attracted concentrically in this polarized drop (4), release by this concentration, a ring (6) more or less regular, optically neutral.

At the edge of the zones (1) and (2), a beam of lower intensity or, of a shorter duration, makes it possible to obtain a polarizing drop, without giving off a ring in the thickness of the film.

The thickness of this ring such that, 0pm 4 e 4 1 00pm.

The distribution and the concentration of these points of impact, allow measurements of light transmission coefficients received a, ss, r, a, E, expressed in% of the intensity of the emitting source crossing the sandwich, or the sandwich assembled meniscus correctors or not, following: a:: neutral zone in white or polarized light Polarized zone measured in white light y: Degraded zone measured in white light from one zone to another 5: Polarized zone measured in polarized light Zone degradation measured in polarized light from one area to another and this whatever the wavelengths in the visible spectrum, polarized or not.

In order to improve the light transmission coefficients and the comfort of use, the external faces of neutral gradient polarized lenses will be anti-reflective treated.

These different coefficients make it possible to understand the operation of these polarized lenses.

In white or polarized light, the neutral zone (3) gives a transmission coefficient a such that 95% 4. a $ 100%
In white light:
The polarized zone (1) has a coefficient ss, such that 30% # ss # 50%, according to the polarization coefficient adopted for this zone of the glasses; and the degraded zone (2) a coefficient y, according to a continuous function, linear or not, such that a>y> ss, from one zone to another.

In polarized light:
The polarized zone (1), a coefficient 6 such that 0.005% G 6 G 2% according to the polarization coefficient adopted for this zone and, depending on the degree of polarization of the sources.

The degraded zone, a coefficient E according to a continuous linear function or not, such that, a> g to 5, from one zone to another.

This embodiment makes it possible to obtain, in white or polarized light, by transforming the film from the polarized zone to the neutral zone, a continuous gradient, without chromatic aberration, without colored bands or rupture of the visual field.

Controlled temperature raising methods from one zone to another, by induction or conduction, make it possible to obtain the same coefficients, for each of these zones, in a simpler way.

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The industrial applications of the processes are intended and reserved for all uses in optical devices emitting polarized light, degraded, neutral, locally or alternatively and, for all optical devices, polarized light receivers or not, whatever the orientation of axes of polarization.

Claims (1)

 1Q A vision device, such as glasses or glasses, characterized by a film of polarizing synthetic molecules uniformly stretched in direction, sandwiched between two mineral or organic menisci, and comprising three zones: polarized, degraded and neutral. The polarized zone (I) consists of a uniform distribution of polarizing molecules, the neutral zone (3) contains none, the degraded zone (2) consists of a suitable distribution of a zone to the polarizing points and neutral spaces in the polarized film. The light transmission coefficient measurements a, ss,, 6,, in% of the light received relative to the emitted light, whatever the wavelengths of the visible spectrum are: In white light for:  - the neutral zone, a coefficient a.  - the polarized area, a coefficient ss,, 30% s ss> 50% according to the coefficient of  polarization retained.  - The degraded area, a coefficient y following a continuous function, linear or not, such that, a r y P, from one area to another. In polarized light for:  - the neutral zone a.  - the wne polarized o, 0.005% 4 8 4 2% according to the polarization coefficient  selected for the glasses and the degree of polarization of the sources.  the degraded zone has a coefficient E according to a continuous function, linear or not, such that a u E> W8 from one zone to another.  2 "The polarizing molecules, polarizing film and polarizing points, according to claim 1, are characterized by an orientation of the polarization axis at 450 to the right of the vertical, in the position of use.  30.Polarizing molecules, polarizing film and polarizing points, according to claim 1  are characterized by an orientation of the polarization axis at 450 to the left of the vertical, in the use position 4 "The polarizing molecules, polarizing film and polarizing points, according to claim 1, are characterized by an orientation of the vertical axis of polarization, in the position of use 5 The intermediate degraded zone (2) according to claim 1 is characterized by its orientation  horizontal in the position of use and, its width from I to 2.5 cm.  6 "Process for producing polarized lenses according to claim 1, characterized by point-like elevations of the polarizing film, by electromagnetic wave beams, with a diameter of between 1 and 100 μm, in the wavelengths of the spectrum. absorbed by the polarizing film, polarized perpendicular to the orientation of the target polarized film. The distribution and concentration of these points of impact transform the polarizing film of the polarized zone to the neutral zone into a degraded zone.  7 "The device according to claim 1, characterized by a sandwich arrangement of two mineral or organic meniscus, the thicknesses and curvatures of which are calculated to obtain corrective or neutral glasses, the external faces will be treated anti-reflective.  8 "Device according to claim 1, characterized by their use for all optical receivers receiving polarized light or not, regardless of the orientations of the polarization axes.