CN215833694U

CN215833694U - Device for displaying an optical design of an ophthalmic lens

Info

Publication number: CN215833694U
Application number: CN202120910032.0U
Authority: CN
Inventors: 张松金; 彭伟; 欧阳鎏; 张磊
Original assignee: Carl Zeiss Optical Technology Service Guangzhou Co ltd; Carl Zeiss Vision Guangzhou Co ltd; Carl Zeiss Optics China Co ltd
Current assignee: Carl Zeiss Optical Technology Service Guangzhou Co ltd; Carl Zeiss Vision Guangzhou Co ltd; Carl Zeiss Optics China Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-02-15
Anticipated expiration: 2031-04-29

Abstract

The utility model relates to a device for displaying an optical design of an ophthalmic lens, comprising: a light source for generating light for illuminating the lens; and a viewing plate for imaging light passing through the lens to form a spot reflecting the optical design of the lens.

Description

Device for displaying an optical design of an ophthalmic lens

Technical Field

The present invention generally relates to devices for displaying an optical design of an ophthalmic lens.

Background

As an ophthalmic lens for correcting vision, there are various optical designs which are applied in lenses to achieve different purposes. Spherical single vision lenses have been used primarily in the past. In recent years, single aspheric lenses, double aspheric lenses, toric lenses, multifocal lenses, etc. have been increasingly replacing conventional spherical single vision lenses for superior optical performance and special functions.

Applicants' myopia management products, such as the MyoVision growing spectacle lens, are lenses that incorporate hyperopic refractive compensation at the lens edge to produce myopic defocus at the retina periphery to control and manage myopia progression. Visualization of the out-of-focus design of such lenses would help to show the mechanism of the product and promote the product.

US2019/0086691a1 provides a presentation instrument for presenting optical characteristics of lenses for eyeglasses, the presentation instrument comprising a light source emitting Ultraviolet (UV) or High Energy Visible (HEV) light and a light sensor receiving light from the light source. Placing a mirror in the optical path between the light source and the light sensor changes the readout of the light sensor and the change in readout is converted into an optical characteristic of the mirror. The optical characteristic of the lens, i.e. at least one of the transmittance of the lens or the cutoff value of the lens, can be viewed on the display device by electronic communication between the presentation instrument and the display device. Thus, the operator can show how well the lenses filter UV or HEV light or reduce glare etc. on the display device by means of the display tool. However, the display means cannot display the optical design of the lens such as the diopter distribution or the power distribution.

There is therefore a need for a device which is able to present such an optical design of a lens for spectacles in an intuitive manner.

SUMMERY OF THE UTILITY MODEL

The present invention provides a device for displaying an optical design of an ophthalmic lens, comprising: a light source for generating light for illuminating the lens; and a viewing plate for imaging light passing through the lens to form a spot reflecting the optical design of the lens.

The device according to the utility model constitutes a lens imaging system by means of which the optical design of the lens to be represented, such as the diopter distribution or the power distribution, can be reflected by the imaged light spots.

According to a preferred embodiment, the device further comprises a variable photo mask, which is adjustable according to the optical design of the lens. In particular, the photomask may be varied according to the optical design of the lens to be exhibited, such as the diopter distribution or the power distribution, so as to produce a spot pattern on the viewing plate that is enlarged or reduced in correspondence with the optical design of the lens, such as the diopter distribution or the power distribution. In other words, the photomask may be used to enhance the display of the device so that the optical design of the lens is more easily recognized.

According to a preferred embodiment, the device further comprises a focusing lens for focusing the light passing through the lens onto the viewing plate. The use of the focusing lens makes it possible to shorten the distance of the lens from the viewing plate, thus making the device more compact.

According to a preferred embodiment, the light source is a light source providing collimated light. Such a light source makes it possible to reduce the spot of light provided on the viewing plate by the lens to be displayed, thus making the device more compact. Meanwhile, the brightness of the light spot is higher, and better contrast can be provided, so that the display effect is improved.

According to a preferred embodiment, the viewing plate can be formed by an imaging plate or a camera, wherein the actually formed light spot can be represented by means of the imaging plate, while the subjective perception of the light spot by the human eye can be simulated by means of the camera.

According to a preferred embodiment, the lens is a myopia management lens having a central zone which ensures that the retina centre perceives a sharp image and an edge zone which creates near defocus at the retina periphery.

In other embodiments, the lenses may be non-myopia management lenses, such as spherical single vision lenses, single aspheric lenses, biaspheric lenses, toric lenses, multifocal lenses, and the like.

Drawings

Figure 1 is a schematic diagram showing the structure of a device for exhibiting an optical design of an ophthalmic lens according to the utility model;

figure 2 schematically shows the optical path of an optical system constituted by a device for presenting the optical design of an ophthalmic lens according to the utility model and by an ophthalmic lens to be presented;

FIG. 3 illustrates in top view an exemplary variable photomask that may be used in an apparatus according to the present invention;

FIG. 4 is a spot imaged by an exemplary non-myopia management lens by an apparatus according to the utility model; and

figure 5 is a spot imaged by an exemplary myopia management lens by means of a device according to the utility model.

Detailed Description

In fig. 1a schematic view of the structure of a device for exhibiting an optical design of an ophthalmic lens according to the utility model is shown. The device comprises a light source 1 and a viewing plate 2. The light source 1 generates light for illuminating a lens to be displayed, simulating light that would ordinarily illuminate an ophthalmic lens. In principle any light source can be used. It is preferable to use a light source that provides parallel light in order to narrow the spot of light provided on the viewing plate 2 through the lens to be displayed, thereby making the device more compact. The viewing plate 2 is used to image the light passing through the lens to form a spot reflecting the optical design of the lens, such as the diopter or power distribution of the lens. The viewing plate 2 can be formed by an imaging plate, by means of which the actually formed light spot can be represented, or by means of which the light spot can be formed simulating the subjective perception of the light spot by the human eye, for example, enlarged.

Fig. 2 schematically shows the optical path of an optical system consisting of a device for presenting an optical design of an ophthalmic lens according to the utility model and an ophthalmic lens 3 to be presented. The device for presenting the optical design of an ophthalmic lens comprises, in addition to a light source 1 and a viewing plate 2, an optional variable photomask 4 and an optional focusing lens 5. An exemplary top view of the variable photomask 4 is shown in fig. 3.

The variable photomask 4 can be adjusted according to the optical design of the ophthalmic lens 3. In particular, the variable photomask 4 may be varied according to the optical design of the ophthalmic lens 3, such as the diopter distribution or the power distribution, so as to produce on the viewing plate a speckle pattern that is enlarged or reduced in correspondence with the optical design of the ophthalmic lens 3, such as the diopter distribution or the power distribution of the lens. In other words, the photomask may be used to enhance the display effect of the device so that the optical design of the ophthalmic lens 3 is more easily recognized.

The focusing lens 5 is used to focus the light passing through the ophthalmic lens 3 onto the viewing plate 2. The use of the focusing lens 5 makes it possible to shorten the distance of the lens from the viewing plate, thus making the device more compact.

The device according to the utility model may be used in particular to display the optical design of a myopia management lens. As mentioned previously, the incorporation of correction into the myopia management lens at the lens edge is insufficient to produce myopic defocus at the periphery of the retina, thereby controlling and managing myopia progression. That is, by this myopic defocus, the central image can be focused on the macular region of the retina, and the peripheral image can be imaged on or in front of the retina, so that the axial lengthening of the eye can be suppressed, and the increase in the myopic power can be controlled. Thus, the myopia management lens has a central region which ensures that the centre of the retina perceives a sharp image, and an edge region which creates myopic defocus at the periphery of the retina. In other words, the central and peripheral zones of the myopia management lens have different power profiles. Thus, as shown in figure 5, the edge region of the spot imaged by the myopia management lens by the device according to the utility model is irregularly shaped compared to the circular central region. In contrast, non-myopia management lenses, such as single vision lenses, have a single diopter. As shown in fig. 4, the spot imaged by this single vision lens by the device according to the utility model corresponds to the shape of the variable photomask shown in fig. 3. It is clear that the device according to the utility model can present the optical design of lenses, in particular myopia management lenses, such as diopter and power profiles in an intuitive way. Of course, the device according to the utility model can also be used to display optical designs of other lenses, such as spherical single-vision lenses or single-aspheric lenses or double-aspheric lenses or toric lenses or multifocal lenses.

As will be appreciated by those skilled in the art, the foregoing description and drawings merely represent non-limiting examples of the devices taught herein. Accordingly, the utility model is not limited by the foregoing description and drawings. Rather, the present invention is limited only by the following claims and their legal equivalents.

Claims

1. Apparatus for displaying an optical design of an ophthalmic lens, comprising:

a light source for generating light for illuminating the lens;

a variable photomask positioned between the light source and the lens and adjustable according to an optical design of the lens; and

a viewing plate for imaging light passing through the lens to form a spot reflecting the optical design of the lens.

2. The apparatus of claim 1, wherein the optical design of the lens is a diopter profile or a power profile.

3. The apparatus of claim 1, further comprising a focusing lens for focusing light passing through the lens onto the viewing plate.

4. The apparatus of claim 1, wherein the light source is a light source that provides collimated light.

5. The apparatus of claim 1, wherein the viewing plate is comprised of an imaging plate or a camera.

6. The device of claim 1, wherein the lens is a myopia management lens having a central region that ensures clear image perception at the center of the retina and an edge region that creates myopic defocus at the periphery of the retina.

7. The device of claim 1, wherein the lens is a spherical single vision lens or a single aspheric lens or a bi-aspheric lens or a toric lens or a multifocal lens.