TWI846403B - Pupil size measurement system and method thereof - Google Patents

Abstract

The present invention sequentially includes a preparation step, a standard size conversion step, and a standard environment pupil size measurement step. According to the aforementioned steps, a near-infrared light element is set to irradiate a detection light toward a left artificial eye, and then a left eye image is obtained from a left artificial eye pupil portion of the left artificial eye, which has a left artificial eye pupil image, and the left artificial eye pupil image has a left artificial eye pupil image size, and the conversion ratio between the left artificial eye pupil image size and the actual size of the left artificial eye pupil portion can be obtained. Similarly, a left eye image can be obtained from a left real eye pupil portion of a left real eye, and at this time, the left eye image has a left real eye pupil image, which has a left real eye standard environment pupil size. The actual size of the left real eye pupil portion can be converted by corresponding the left real eye standard environment pupil image size to the aforementioned conversion ratio. This solution is very convenient for measuring pupil size by simple pixel conversion ratio, and the device is simple and easy to operate.

Description

Pupil size measurement system and measurement method

The present invention relates to a pupil size measurement system and a method thereof, and in particular to a pupil size measurement system and a method thereof that can conveniently measure pupil size by a simple pixel conversion ratio, and a simple and easy-to-operate device.

The industry is well aware that pupil dilation or contraction data can be used to assist ophthalmologists in assessing the condition of the eye.

For example, pupil anisotropy generally refers to the different sizes of pupils in the same person's two eyes. One pupil may be larger than the average pupil, or one pupil may be smaller than the average pupil, resulting in unequal pupil sizes. The pupils of both eyes may or may not react normally to light. In most cases, pupil anisotropy is benign.

However, if the pupils of both eyes suddenly become different in size, this less common pupil size difference may be a symptom of an eye disease.

When there is an eye disease, the physiological movement of the pupil in response to light may also change.

To date, there is no measurement system or method that can easily detect changes in pupil size.

In view of this, it is necessary to develop technology that can solve the above-mentioned shortcomings.

The purpose of the present invention is to provide a pupil size measurement system and method, which has the advantages of being very convenient to measure pupil size with a simple pixel conversion ratio, and the device is simple and easy to operate. In particular, the problem that the present invention aims to solve is that when the pupil sizes of the two eyes suddenly become inconsistent, this relatively uncommon pupil size imbalance may be a symptom of an ophthalmic disease. And when the eyes have a disease, the physiological movement of the pupil in response to light may also change accordingly. However, there is currently no measurement system and measurement method that can simply detect changes in pupil size.

The technical means to solve the above-mentioned problem is to provide a pupil size measurement system and a measurement method thereof. The measurement system comprises: a light-combining prism, which is used to be arranged on a central axis; a detection eye fixing area, which is arranged corresponding to the light-combining prism, and the detection eye fixing area includes a left eye positioning area and a right eye positioning area, and the left and right eye positioning areas are respectively arranged on a first axis and a second axis; the first and second axes are respectively parallel to the left and right sides of the central axis; a first aperture, which is arranged on the first axis corresponding to the left eye positioning area, and the first aperture is The invention relates to a lens having an adjustable aperture; a second aperture, which is arranged on the second axis corresponding to the right eye positioning area, and the second aperture is an adjustable aperture; one of the first and second apertures is located in an open position, and the other is located in a closed position; a first plane mirror, which is arranged on the first axis corresponding to the first aperture, and is located on one side of the light-combining prism; a second plane mirror, which is arranged on the second axis corresponding to the second aperture, and is located on the other side of the light-combining prism; a sight mark portion, which is arranged on the central axis corresponding to the light-combining prism, and the sight mark portion includes a A first beam splitter and a visual mark generating element; the first beam splitter is located on the central axis, the visual mark generating element is used to irradiate a visual mark image toward the first beam splitter, the visual mark image is reflected from the first beam splitter to the light-combining prism, and then from the light-combining prism, respectively, through the first plane mirror and the second plane mirror, and respectively reflected to the left eye positioning area and the right eye positioning area; a near-infrared light detection unit is corresponding to the light-combining prism and is used to be arranged on the central axis, the near-infrared light detection unit includes a second beam splitter and a near-infrared light element, the second beam splitter is arranged on the central axis , the near-infrared light element is used to irradiate a detection light toward the second spectroscope, the detection light is irradiated to the light-combining prism after penetrating the second spectroscope and the first spectroscope, and then respectively reflected to the left eye positioning area and the right eye positioning area through the first plane mirror and the second plane mirror; and a near-infrared light image capture unit is provided corresponding to the near-infrared light detection unit, and the near-infrared light image capture unit is used to obtain at least one of a left eye image from the left eye positioning area and a right eye image from the right eye positioning area through the second spectroscope, the first spectroscope and the light-combining prism.

The measurement method includes the following steps: 1. Preparation step; 2. Standard size conversion step; and 3. Pupil size measurement step in a standard environment.

The above-mentioned purposes and advantages of the present invention can be easily understood from the detailed description and accompanying drawings of the following selected embodiments.

The present invention is described in detail with the following embodiments and accompanying drawings:

10: Light-combining prism

20: Detect eye fixation area

21: Left eye positioning area

211: Left eye image

21A: Left prosthetic eye pupil image

21B: Left real eye pupil image in standard environment

21C: Left real eye pupil image in bright environment

22: Right eye positioning area

221: Right eye image

30: First aperture

40: Second aperture

50: First plane mirror

60: Second plane mirror

70: Optometrist department

71: The first spectroscope

72: Visual mark generation component

721: Visual mark image

80: Near infrared light detection unit

81: Second spectroscope

82:Near infrared light element

821: Detection light

90: Near infrared light image capture unit

91: Parabolic mirror

92: Near infrared image capture element

R: Ruler

L: Flash light

L1: Flash

X0: Central axis

X1: first axis

X2: Second axis

P1: Open position

P2: Closed position

D0: left prosthetic eye pupil image size

D1: Left real eye standard environment pupil image size

D2: left real eye pupil image size in bright environment

S1: Preparation steps

S2: Standard size conversion steps

S3: Pupil size measurement steps in standard environment

SS1: Flash detection step

SS2: Pupil size measurement steps in bright environment

SS3: Pupil size measurement steps in dim environment

Figure 1A is a schematic diagram of an embodiment of the present invention.

Figure 1B is a schematic diagram of part of the device in Figure 1A from another angle.

Figure 2 is a schematic diagram of one of the measurement processes of the present invention.

Figure 3 is a schematic diagram of the second measurement process of the present invention.

Figure 4 is a schematic diagram of the third measurement process of the present invention.

Figure 5 is a schematic diagram of the first (second) aperture of the present invention.

Figures 6A and 6B are schematic diagrams of the fully open and fully closed apertures of Figure 5, respectively.

Figure 7 is a schematic diagram of the standard environment measurement results of the artificial eye of the present invention.

Figure 8A is a schematic diagram of the real eye measurement results in the standard environment of the present invention.

Figure 8B is a schematic diagram of the real eye measurement results in a bright environment of the present invention.

Figure 9 is a flow chart of the measurement method of the present invention.

The present invention is a pupil size measurement system and a measurement method thereof. Referring to Figures 1A and 1B, the measurement system includes:

A light-combining prism 10 is used to be arranged on a central axis X0.

A detection eye fixing area 20 is provided corresponding to the light-combining prism 10. The detection eye fixing area 20 includes a left eye positioning area 21 and a right eye positioning area 22. The left and right eye positioning areas 21 and 22 are respectively provided on a first axis X1 and a second axis X2; the first and second axes X1 and X2 are respectively parallel to the left and right sides of the central axis X0.

A first aperture 30 is disposed on the first axis X1 corresponding to the left eye positioning area 21. The first aperture 30 is an adjustable aperture (as shown in FIG. 5 ).

A second aperture 40 is disposed on the second axis X2 corresponding to the right eye positioning area 22, and the second aperture X2 is an adjustable aperture (as shown in FIG. 5). The first and second apertures 30 and 40 are one of which is located at an open position P1 (the open position P1 of the first and second apertures 30 and 40 is shown in FIG. 6A, but in fact, the two apertures are one open and one closed), and the other is located at a closed position P2 (the closed position P2 of the first and second apertures 30 and 40 is shown in FIG. 6B, but in fact, the two apertures are one open and one closed).

A first plane mirror 50 is disposed on the first axis X1 corresponding to the first aperture 30 and is located on one side of the light-combining prism 10.

A second plane mirror 60 is disposed on the second axis X2 corresponding to the second aperture 40 and is located on the other side of the light-combining prism 10.

A sight mark portion 70 is provided on the central axis X0 corresponding to the light-combining prism 10. The sight mark portion 70 includes a first spectroscope 71 and a sight mark generating element 72. The first spectroscope 71 is located on the central axis X0; the sight mark generating element 72 is used to irradiate a sight mark image 721 (as shown in FIG. 2) toward the first spectroscope 71. The sight mark image 721 is reflected from the first spectroscope 71 to the light-combining prism 10, and then from the light-combining prism 10, respectively, through the first plane mirror 50 and the second plane mirror 60, and respectively reflected to the left eye positioning area 21 and the right eye positioning area 22. Machine

A near-infrared light detection unit 80 is provided on the central axis X0 corresponding to the light-combining prism 10. The near-infrared light detection unit 80 includes a second spectroscope 81 and a near-infrared light element 82 (as shown in FIG. 3). The second spectroscope 81 is provided on the central axis X0. The near-infrared light element 82 is used to irradiate a detection light 821 toward the second spectroscope 81. The detection light 821 penetrates the second spectroscope 81 and the first spectroscope 71, and then irradiates the light-combining prism 10, and then passes through the first plane mirror 50 and the second plane mirror 60, and is reflected to the left eye positioning area 21 and the right eye positioning area 22, respectively.

A near-infrared light image capture unit 90 is provided corresponding to the near-infrared light detection unit 80. The near-infrared light image capture unit 90 is used to obtain at least one of a left eye image 211 (as shown in FIGS. 4, 8A and 8B) from the left eye positioning area 21 and a right eye image 221 (as shown in FIGS. 8A and 8B) from the right eye positioning area 22 through the second beam splitter 81, the first beam splitter 71 and the light combining prism 10.

In practice, the first plane mirror 50 is a structure having the characteristics of reflecting visible light (such as the sight mark image 721) and invisible light (such as the detection light 821).

The second plane mirror 60 has a structure that has the characteristics of reflecting visible light (such as the sight mark image 721) and invisible light (such as the detection light 821).

The first spectroscope 71 has a structure that has the characteristics of reflecting visible light and allowing invisible light to pass through.

The second spectroscope 81 has a structure that has the characteristics of partially reflecting and partially transmitting invisible light.

The near-infrared light image capturing section 90 may include a parabolic mirror 91 and a near-infrared light image capturing element 92. The parabolic mirror 91 is between the second spectroscope 81 and the near-infrared light image capturing element 92; the near-infrared light image capturing element 92 obtains at least one of a left eye image 211 (as shown in Figures 4 , 8A and 8B) from the left eye positioning area 21 and a right eye image 221 (as shown in Figures 8A and 8B) from the right eye positioning area 22 through the parabolic mirror 91, the second spectroscope 81, the first spectroscope 71 and the light combining prism 10.

Furthermore, the present invention may further include a ruler R, which is disposed on the central axis X0 and between the left eye positioning area 21 and the right eye positioning area 22;

The near-infrared light image capture unit 90 is used to obtain the image of the ruler R through the second beam splitter 81, the first beam splitter 71 and the light-combining prism 10, and overlap it with one of the left eye image 211 and the right eye image 221, so as to assist in measuring the design of one of the left eye image 211 and the right eye image 221.

Refer to Figure 9, which describes the measurement method, which includes the following steps:

A preparation step S1: Referring to FIGS. 1A and 1B, a pupil size measurement system is pre-set, which includes a light-combining prism 10, a detection eye fixing area 20, a first aperture 30, a second aperture 40, a first plane mirror 50, a second plane mirror 60, a sight mark section 70, a near-infrared light detection section 80, and a near-infrared light image capture section 90. The light-combining prism 10 is used to be arranged on a central axis X0; the detection eye fixing area 20 is arranged corresponding to the light-combining prism 10, and the detection eye fixing area 20 includes a left eye positioning area 21 and a right eye positioning area 22, and the left and right eye positioning areas 21 and 22 are respectively used to be arranged on a first axis X1 and a second axis X2; the first and second axes X1 and X2 are respectively parallel to the left and right sides of the central axis X0. The first aperture 30 is arranged on the first axis X1 corresponding to the left eye positioning area 21, and the first aperture 30 is an adjustable aperture (as shown in FIG. 5). The second aperture 40 is arranged on the second axis X2 corresponding to the right eye positioning area 22, and the second aperture X2 is an adjustable aperture. The first and second apertures 30 and 40 are one of which is located at an open position P1 (the open position P1 of the first and second apertures 30 and 40 is shown in Figure 6A, but in fact, the two apertures are one open and one closed), and the other is located at a closed position P2 (the closed position P2 of the first and second apertures 30 and 40 is shown in Figure 6B, but in fact, the two apertures are one open and one closed). The first plane mirror 50 is arranged on the first axis X1 corresponding to the first aperture 30, and is located on one side of the light-combining prism 10. The second plane mirror 60 is disposed on the second axis X2 corresponding to the second aperture 40 and is located on the other side of the light-combining prism 10. The sight mark portion 70 is disposed on the central axis X0 corresponding to the light-combining prism 10 and includes a first beam splitter 71 and a sight mark generating element 72. The first beam splitter 71 is located on the central axis X0; the sight mark generating element 72 is used to irradiate a sight mark image 721 (as shown in FIG. 2 ) toward the first beam splitter 71. The sight mark image 721 is reflected from the first beam splitter 71 to the light-combining prism 10, and then reflected from the light-combining prism 10 through the first plane mirror 50 and the second plane mirror 60 to the left eye positioning area 21 and the right eye positioning area 22, respectively. The near-infrared light detection unit 80 corresponds to the light-combining prism 10 and is used to be arranged on the central axis X0, and the near-infrared light detection unit 80 includes a second beam splitter 81 and a near-infrared light element 82 (as shown in FIG. 3 ). The second beam splitter 81 is arranged on the central axis X0, and the near-infrared light element 82 is used to irradiate a detection light 821 toward the second beam splitter 81. The detection light 821 penetrates the second beam splitter 81 and the first beam splitter 71 and then irradiates the light-combining prism 10, and then is reflected from the light-combining prism 10 through the first plane mirror 50 and the second plane mirror 60 respectively, and is respectively reflected to the left eye positioning area 21 and the right eye positioning area 22. The near-infrared light image capture unit 90 is provided corresponding to the near-infrared light detection unit 80, and the near-infrared light image capture unit 90 is used to obtain at least one of a left eye image 211 (as shown in Figures 4, 8A and 8B) from the left eye positioning area 21 and a right eye image 221 (as shown in Figures 8A and 8B) from the right eye positioning area 22 through the second beam splitter 81, the first beam splitter 71 and the light combining prism 10.

2. Standard size conversion step S2: When the first aperture 30 is located at the open position P1 and the second aperture 40 is located at the closed position P2, the left eye positioning area 21 is used to set a left artificial eye (which can be a known medical or teaching artificial eye, not shown in the figure, and will be explained in advance), and the left artificial eye has a left artificial eye pupil of a known size. Then the near-infrared light element 82 (as shown in FIG. 3) is controlled to irradiate the detection light 821 toward the second spectroscope 81. The detection light 821 penetrates the second spectroscope 81 and the first spectroscope 71 and then irradiates the light-combining prism 10, and then is reflected from the light-combining prism 10 through the first plane mirror 50 and the second plane mirror 60 to the left artificial eye pupil on the left eye positioning area 21. In fact, in FIG. 3, the second aperture 40 is located at the closed position P2 to block the detection light 821 from irradiating the right eye positioning area 22. Then, the near-infrared light image capture element 92 is controlled to obtain the left eye image 211 (as shown in FIG. 7) from the pupil of the left artificial eye. At this time, the left eye image 211 has a left artificial eye pupil image 21A, and the left artificial eye pupil image 21A has a left artificial eye pupil image size D0, and thus the conversion ratio between the left artificial eye pupil image size D0 and the actual size of the left artificial eye pupil can be obtained.

Similarly, when the first aperture 30 is at the closed position P2 and the second aperture 40 is at the open position P1, the right eye positioning area 22 is used to set a right artificial eye (which can be a known medical or teaching artificial eye, not shown in the figure, please explain it in advance), and the right artificial eye has a right artificial eye pupil part of a known size. The same process is used to obtain the right eye image 221 (refer to Figure 7), at this time the right eye image 221 has a right artificial eye pupil image (refer to the left artificial eye pupil image), the right artificial eye pupil image has a right artificial eye pupil image size, and then the conversion ratio between the right artificial eye pupil image size and the actual size of the right artificial eye pupil part can be obtained.

3. Pupil size measurement in a standard environment S3: The pupil size measurement system is used to be set in a standard environment. The standard environment is defined as an environment with a brightness of 200±10% lux. In the standard environment, the first aperture 30 is located at the open position P1 and the second aperture 40 is located at the closed position P2. The left artificial eye in the left eye positioning area 21 is removed and replaced with a left real eye (not shown in the figure, but actually a left real eye on the face). The left eye and the right eye are located in the left eye positioning area 21 and the right eye positioning area 22 respectively), the left real eye has a left real eye pupil, and then the sight mark generating element 72 is controlled to irradiate the sight mark image 721 toward the first dichroic mirror 71, the sight mark image 721 is reflected from the first dichroic mirror 71 to the light-combining prism 10, and then reflected from the light-combining prism 10 to the left eye positioning area 21 through the first plane mirror 50, and the line of sight of the left real eye is toward the sight mark image 721. In fact, in FIG. 2, the second aperture 40 is located at the closed position P2 to prevent the sight mark image 721 from irradiating the right eye positioning area 22 (i.e., the right eye). Next, the near infrared light element 82 (as shown in FIG. 3 ) is controlled to irradiate the detection light 821 toward the second beam splitter 81. The detection light 821 penetrates the second beam splitter 81 and the first beam splitter 71 and then irradiates the light combining prism 10. Then, the light combining prism 10 is reflected by the first plane mirror 50 to the left real eye pupil portion on the left eye positioning area 21. The second aperture 40 is located at the closed position P2 to block the detection light 821 from irradiating the right eye positioning area 22. Next, the near-infrared light image capture element 92 is controlled to obtain the left eye image 211 of the left real eye pupil. At this time, the left eye image 211 has a left real eye standard environment pupil image 21B (as shown in Figure 8A). The left real eye standard environment pupil image 21B has a left real eye standard environment pupil size D1. The left real eye standard environment pupil size D1 is then corresponded to the aforementioned conversion ratio to convert the actual size of the left real eye pupil. Similarly, when the first aperture 30 is located at the closed position P2 and the second aperture 40 is located at the open position P1, the right eye positioning area 22 is used to set a right real eye, and the right real eye has a right real eye pupil. The right eye image 221 is obtained by the aforementioned process (refer to FIG. 8A). At this time, the right eye image 221 has a right real eye standard environment pupil image (refer to the left real eye standard environment pupil image). The right real eye standard environment pupil image has a right real eye standard environment pupil image size. Then, the right real eye standard environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the right real eye pupil can be converted.

In fact, the conversion ratio between the left prosthetic eye pupil image size D0 and the actual size of the left prosthetic eye pupil in the standard size conversion step S2. For example, assuming that the left prosthetic eye pupil image 21A is 1920 (X axis) * 1080 (Y axis); the left prosthetic eye pupil image size D0 (X axis) is approximately 1/5 of 1920, then: 1920/5=384 pixels, and the corresponding actual size of the left prosthetic eye pupil is 6mm.

If the left real eye standard environment pupil image size D1 is 390 pixels, then: 6/384=Q/390; it can be calculated that: Q=6.09mm, which is the actual size of the left real eye pupil in the standard environment.

Assuming that the pupil image size D2 of the left real eye in bright light environment is 380 pixels, then: 6/384=Q/380; it can be calculated that: Q=5.94mm, which is the actual size of the pupil of the left real eye in the bright light environment.

In addition, the present case may further include a flash detection step SS1 between the standard size conversion step S2 and the pupil size measurement step S3 in the standard environment: at this time, the left artificial eye in the left eye positioning area 21 is removed, and the left real eye is pre-set. Then, a flash light L is prepared, and the flash light L is used to flash at least once L1 toward the detection eye fixing area 20 (as shown in Figure 4), and the left eye image 211 is obtained by using the near-infrared light image capture element 92. If the pupil image size of the left eye image 211 before and after the at least one flash L1 does not change, it is judged as abnormal, that is, the measurement is stopped, otherwise it is normal, and the pupil size measurement step S3 in the standard environment is performed.

Furthermore, after the pupil size measurement step S3 in the standard environment, the present invention may further include the following steps: a pupil size measurement step SS2 in a bright environment: the pupil size measurement system is changed to be set in a bright environment, and the bright environment is defined as an environment with a brightness of 300±10% lux. In the bright environment, the first aperture 30 is located at the open position P1 and the second aperture 40 is located at the closed position P2, and the left pupil is measured. The measurement of the aperture size is to obtain the left eye image 211 using the near-infrared light image capture element 92. At this time, the left eye image 211 has a left real eye bright environment pupil image 21C (as shown in Figure 8B). The left real eye bright environment pupil image 21C has a left real eye bright environment pupil size D2. The left real eye bright environment pupil size D2 corresponds to the aforementioned conversion ratio, and the actual size of the left real eye pupil in the bright environment can be converted.

Similarly, when the first aperture 30 is at the closed position P2 and the second aperture 40 is at the open position P1, the right eye positioning area 22 is used to set the right real eye, and the right real eye has a right real eye pupil. The right eye image 221 is obtained by the aforementioned process (refer to Figure 8B). At this time, the right eye image 221 has a right real eye bright environment pupil image (refer to the left real eye bright environment pupil image), and the right real eye bright environment pupil image has a right real eye bright environment pupil image size. Then, the right real eye bright environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the right real eye pupil in the bright environment can be converted.

A pupil size measurement step SS3 in a dim environment: The pupil size measurement system is set in a dim environment, which is defined as an environment with a brightness of 150±10% lux. In the dim environment, the first aperture 30 is located at the open position P1 and the second aperture 40 is located at the closed position P2, and the left eye pupil size is measured using the near-infrared light image capture element 9. 2 Obtain the left eye image 211. At this time, the left eye image 211 has a left real eye dark environment pupil image. The left real eye dark environment pupil image has a left real eye dark environment pupil size (in principle, it will be larger than the left real eye standard environment pupil size D1 in Figure 8A). Then, the left real eye dark environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the left real eye pupil in the dark environment can be converted.

Similarly, when the first aperture 30 is at the closed position P2 and the second aperture 40 is at the open position P1, the right eye positioning area 22 is used to set the right real eye, and the right real eye has a right real eye pupil. The right eye image 221 is obtained by the aforementioned process. At this time, the right eye image 221 has a right real eye dark environment pupil image. The right real eye dark environment pupil image has a right real eye dark environment pupil image size. Then, the right real eye dark environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the right real eye pupil in the dark environment can be converted.

In short, in this case, the near-infrared light element 82 is first used to irradiate the detection light 821 toward the artificial eye on the left (or right) eye positioning area 21 (or 22), and then the near-infrared light image capture element 92 obtains the left (or right) eye image 211 (or 221) (as shown in Figure 7) from the pupil of the artificial eye. The left eye image 211 has a left artificial eye pupil image 21A, and the left artificial eye pupil image 21A has a left artificial eye pupil size D0. Then, the conversion ratio between the left artificial eye pupil size D0 and the actual size of the left artificial eye pupil can be obtained (the conversion ratio of the right artificial eye can be obtained in the same way, so it will not be repeated here).

Next, the same process is followed, except that the artificial eye is replaced with a real eye (actually, the left eye and the right eye on the human face are located in the left eye positioning area 21 and the right eye positioning area 22 respectively). The near-infrared light image capture element 92 can also obtain the left eye image 211 (as shown in FIG. 8A) from the pupil of the real eye. At this time, the left eye image 211 has the left real eye standard environment pupil image 21B. The environment pupil image 21B has the standard environment pupil size D1 of the left real eye, and then the standard environment pupil size D1 of the left eye corresponds to the aforementioned conversion ratio to convert the actual size of the pupil of the left real eye; similarly, when the second aperture 40 is located at the open position P1 and the first aperture 30 is located at the closed position P2, the pupil size of the right eye is measured, and finally, the actual size of the pupil of the right real eye can also be obtained.

The advantages and effects of the present invention can be summarized as follows:

[1] It is very convenient to measure pupil size with a simple pixel conversion ratio. In this case, the artificial eye is first measured to obtain the conversion ratio between the pupil image size of the artificial eye (actually including the pupil image size of the left artificial eye and the pupil image size of the right artificial eye) and the actual size of the pupil of the artificial eye. The artificial eye can be removed and the pupil of the real eye can be measured. When the pupil size of the real eye standard environment is obtained (actually including the pupil image size of the left real eye standard environment and the pupil image size of the right real eye standard environment), the actual size of the pupil of the real eye can be calculated according to the above conversion ratio. It does not require complicated formulas or a lot of calculations. Therefore, it is very convenient to measure pupil size with a simple pixel conversion ratio.

[2] The device is simple and easy to operate. The light-combining prism, the detection eye fixing area, the first aperture, the second aperture, the first plane mirror, the second plane mirror, the sight mark unit, the near-infrared light detection unit and the near-infrared light image capture unit in this case are all simple known devices and do not require additional research and development. The measurement process is simply lighting and photography. Therefore, the device is simple and easy to operate.

The above is only a detailed description of the present invention through a preferred embodiment. Any simple modification and change made to the embodiment does not deviate from the spirit and scope of the present invention.

10: Light-combining prism

20: Detect eye fixation area

21: Left eye positioning area

22: Right eye positioning area

30: First aperture

40: Second aperture

50: First plane mirror

60: Second plane mirror

70: Optometrist department

71: The first spectroscope

72: Visual mark generation component

80: Near infrared light detection unit

81: Second spectroscope

82:Near infrared light element

90: Near infrared light image capture unit

91: Parabolic mirror

92: Near infrared image capture element

R: Ruler

L: Flash light

X0: Central axis

X1: first axis

X2: Second axis

Claims (9)

A pupil size measurement system includes: a light-combining prism, which is used to be arranged on a central axis; a detection eye fixing area, which is arranged corresponding to the light-combining prism, and the detection eye fixing area includes a left eye positioning area and a right eye positioning area, and the left and right eye positioning areas are respectively arranged on a first axis and a second axis; the first and second axes are respectively parallel to the left and right sides of the central axis; a first aperture, which is arranged on the first axis corresponding to the left eye positioning area, and the first aperture is an adjustable aperture; a second aperture is arranged corresponding to the right eye positioning area The first and second apertures are arranged on the second axis in a certain area, and the second aperture is an adjustable aperture; one of the first and second apertures is located at an open position, and the other is located at a closed position; a first plane mirror is arranged on the first axis corresponding to the first aperture, and is located on one side of the light-combining prism; a second plane mirror is arranged on the second axis corresponding to the second aperture, and is located on the other side of the light-combining prism; an optotype portion is arranged on the central axis corresponding to the light-combining prism, and the optotype portion includes a first dichroic mirror and an optotype generating element; The first beam splitter is located on the central axis, the visual mark generating element is used to irradiate a visual mark image toward the first beam splitter, the visual mark image is reflected from the first beam splitter to the light-combining prism, and then from the light-combining prism, respectively, through the first plane mirror and the second plane mirror, and respectively reflected to the left eye positioning area and the right eye positioning area; a near-infrared light detection unit is corresponding to the light-combining prism and is used to be arranged on the central axis, the near-infrared light detection unit includes a second beam splitter and a near-infrared light element, the second beam splitter is arranged on the central axis, the near-infrared light element It is used to irradiate a detection light toward the second spectroscope, and the detection light is irradiated to the light-combining prism after passing through the second spectroscope and the first spectroscope, and then respectively reflected to the left eye positioning area and the right eye positioning area through the first plane mirror and the second plane mirror; and a near-infrared light image capture unit is provided corresponding to the near-infrared light detection unit, and the near-infrared light image capture unit is used to obtain at least one of a left eye image from the left eye positioning area and a right eye image from the right eye positioning area through the second spectroscope, the first spectroscope and the light-combining prism. The pupil size measurement system as described in claim 1, wherein: the first plane mirror is a structure having the characteristics of reflecting visible light and invisible light; the second plane mirror is a structure having the characteristics of reflecting visible light and invisible light; the first spectroscope is a structure having the characteristics of reflecting visible light and allowing invisible light to pass; and the second spectroscope is a structure having the characteristics of partially reflecting and partially passing invisible light; and the pupil The hole size measurement system further includes: a ruler, which is arranged on the central axis and between the left eye positioning area and the right eye positioning area; and the near-infrared light image capture unit is used to obtain the image of the ruler through the second spectroscope, the first spectroscope and the light-combining prism, and overlap it with one of the left eye image and the right eye image, so as to assist in measuring one of the left eye image and the right eye image. The pupil size measurement system as described in claim 1, wherein: the near-infrared light image capture section includes a parabola and a near-infrared light image capture element; and the parabola is between the second beam splitter and the near-infrared light image capture element; the near-infrared light image capture element obtains at least one of a left eye image from the left eye positioning area and a right eye image from the right eye positioning area through the parabola, the second beam splitter, the first beam splitter and the light combining prism. A method for measuring pupil size includes the following steps: a preparation step: pre-setting a pupil size measurement system, which includes a light-combining prism, a detection eye fixing area, a first aperture, a second aperture, a first plane mirror, a second plane mirror, a sight mark part, a near-infrared light detection part and a near-infrared light image capture part; the light-combining prism is used to be set at a central The detection eye fixing area is arranged corresponding to the light-combining prism, and the detection eye fixing area includes a left eye positioning area and a right eye positioning area, and the left and right eye positioning areas are respectively arranged on a first axis and a second axis; the first and second axes are respectively parallel to the left and right sides of the central axis; the first aperture is arranged on the first axis corresponding to the left eye positioning area. The first aperture is an adjustable aperture; the second aperture is arranged on the second axis corresponding to the right eye positioning area, and the second aperture is an adjustable aperture; one of the first and second apertures is located in an open position, and the other is located in a closed position; the first plane mirror is arranged on the first axis corresponding to the first aperture, and is located at the light-combining prism. The first optical mirror is disposed on one side of the optical prism; the second plane mirror is disposed on the second axis corresponding to the second aperture and is located on the other side of the optical prism; the sight mark portion is disposed on the central axis corresponding to the optical prism, and the sight mark portion includes a first spectroscope and a sight mark generating element; the first spectroscope is located on the central axis; the sight mark generating element is used to illuminate the first spectroscope The near-infrared light detection unit is configured to project a visual target image, which is reflected from the first dichroic mirror to the light-combining prism, and then respectively reflected from the light-combining prism to the left eye positioning area and the right eye positioning area through the first plane mirror and the second plane mirror; the near-infrared light detection unit is configured to correspond to the light-combining prism and is disposed on the central axis, and the near-infrared light detection unit includes a second dichroic mirror and a near The infrared light element is provided, the second beam splitter is arranged on the central axis, the near infrared light element is used to irradiate a detection light toward the second beam splitter, the detection light is irradiated to the light-combining prism after penetrating the second beam splitter and the first beam splitter, and then is reflected from the light-combining prism to the left eye positioning area and the right eye positioning area respectively through the first plane mirror and the second plane mirror; the near infrared light element is used to irradiate a detection light toward the second beam splitter, the detection light is irradiated to the light-combining prism after penetrating the second beam splitter and the first beam splitter, and then is reflected from the light-combining prism to the left eye positioning area and the right eye positioning area respectively through the first plane mirror and the second plane mirror; The external light image capturing section is provided corresponding to the near infrared light detection section, and the near infrared light image capturing section is used to obtain at least one of a left eye image from the left eye positioning area and a right eye image from the right eye positioning area through the second spectroscope, the first spectroscope and the light combining prism; 2. The standard size conversion step: when the first aperture is at the open position and the first aperture is at the open position, the first aperture is at the open position. The two apertures are located in the closed position, and the left eye positioning area is used to set a left artificial eye, and the left artificial eye has a left artificial eye pupil part of a known size; then the near-infrared light element is controlled to irradiate the detection light toward the second spectroscope, and the detection light penetrates the second spectroscope and the first spectroscope and then irradiates the light-combining prism, and then passes through the first plane mirror and the second plane mirror from the light-combining prism. , reflected to the left prosthetic eye pupil portion on the left eye positioning area; and the second aperture is located at the closed position to block the detection light from irradiating the right eye positioning area, and then the near-infrared light image capture element is controlled to obtain the left eye image from the left prosthetic eye pupil portion, at this time the left eye image has a left prosthetic eye pupil image, and the left prosthetic eye pupil image has a left prosthetic eye pupil image size, and then the conversion ratio between the left prosthetic eye pupil image size and the actual size of the left prosthetic eye pupil portion can be obtained; when the first aperture is located at the closed position and the second aperture is located at the open position, the right eye positioning area is used to set a right prosthetic eye, and the right prosthetic eye has a right prosthetic eye pupil portion of a known size; the right eye image is obtained by the same process as above, and at this time the right eye image has a right prosthetic eye pupil size. The pupil image of the right artificial eye has a right artificial eye pupil image size, and then the conversion ratio between the right artificial eye pupil image size and the actual size of the pupil part of the right artificial eye can be obtained; and 3. Pupil size measurement in a standard environment: The pupil size measurement system is used to be set in a standard environment, and the standard environment is defined as an environment with a brightness of 200±10% lux. In the standard environment, when the first aperture is in the open position and the second aperture is in the closed position, the left artificial eye in the left eye positioning area is removed and replaced with a left real eye, which has a left real eye pupil part, and then the visual mark generating element is controlled to irradiate the visual mark image toward the first dichroic mirror, and the visual mark image is reflected from the first dichroic mirror. The light is then reflected from the light-combining prism to the left eye positioning area through the first plane mirror. The line of sight of the left real eye is toward the sight mark image. The second aperture is located at the closed position to prevent the sight mark image from irradiating the right eye positioning area. Then, the near-infrared light element is controlled to irradiate the detection light toward the second spectroscope. The detection light penetrates the second spectroscope and the first The light is then irradiated to the light-combining prism through the spectroscope, and then reflected from the light-combining prism to the left real eye pupil portion on the left eye positioning area through the first plane mirror. The second aperture is located in the closed position to block the detection light from irradiating the right eye positioning area. Then, the near-infrared light image capture element is controlled to obtain the left eye image from the left real eye pupil portion. At this time, the left eye image has a left real eye mark. The quasi-environment pupil image of the left real eye standard environment pupil image has a left real eye standard environment pupil size, and then the left real eye standard environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the left real eye pupil can be converted; when the first aperture is located at the closed position and the second aperture is located at the open position, the right eye positioning area is used to set a right real eye, the The right real eye has a right real eye pupil. The right eye image is obtained by the aforementioned process. At this time, the right eye image has a right real eye standard environment pupil image. The right real eye standard environment pupil image has a right real eye standard environment pupil image size. Then, the right real eye standard environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the right real eye pupil can be converted. The method for measuring pupil size as described in claim 4, wherein: the first plane mirror is a structure having the characteristics of reflecting visible light and invisible light; the second plane mirror is a structure having the characteristics of reflecting visible light and invisible light; the first spectroscope is a structure having the characteristics of reflecting visible light and allowing invisible light to pass; and the second spectroscope is a structure having the characteristics of partially reflecting and partially passing invisible light; and the pupil The hole size measurement system further includes: a ruler, which is arranged on the central axis and between the left eye positioning area and the right eye positioning area; and the near-infrared light image capture unit is used to obtain the image of the ruler through the second spectroscope, the first spectroscope and the light-combining prism, and overlap it with one of the left eye image and the right eye image, so as to assist in measuring one of the left eye image and the right eye image. The pupil size measurement method as described in claim 4, wherein: the near-infrared light image capturing section includes a parabolic mirror and a near-infrared light image capturing element; and the parabolic mirror is between the second beam splitter and the near-infrared light image capturing element; the near-infrared light image capturing element obtains at least one of a left eye image from the left eye positioning area and a right eye image from the right eye positioning area through the parabolic mirror, the second beam splitter, the first beam splitter and the light combining prism. The pupil size measurement method as described in claim 4, wherein the standard size conversion step and the pupil size measurement step in the standard environment further include: a flash detection step: remove the left artificial eye in the left eye positioning area, pre-set a left real eye, and then set a flash light, the flash light is used to flash at least once towards the detection eye fixed area, and use the near-infrared light image capture element to obtain the left eye image. If the pupil image size of the left eye image does not change before and after the at least one flash, it is judged to be abnormal, that is, the measurement is stopped, otherwise it is normal, and the pupil size measurement step in the standard environment is performed. The pupil size measurement method as described in claim 4, wherein, after the pupil size measurement step in the standard environment, further comprises: a pupil size measurement step in a bright environment: the pupil size measurement system is changed to be set in a bright environment, the bright environment is defined as an environment with a brightness of 300±10% lux, in the bright environment, the first aperture is located in the open position and the second aperture is located in the closed position, the left eye positioning area is used to set the left real eye, the left real eye has the left real eye pupil part, and the near The infrared light image capture element obtains the left eye image, and at this time, the left eye image has a left real eye bright environment pupil image, and the left real eye bright environment pupil image has a left real eye bright environment pupil size, and then the conversion ratio in the conversion step of the left real eye bright environment pupil size corresponding to the standard size can be used to convert the actual size of the left real eye pupil in the bright environment; and when the first aperture is located at the closed position and the second aperture is located at the open position, the right eye positioning area is used to set the right real eye, and the right real eye has a right real eye pupil. The right eye image is obtained by the aforementioned process. At this time, the right eye image has a right real eye bright environment pupil image. The right real eye bright environment pupil image has a right real eye bright environment pupil image size. Then, the right real eye bright environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the right real eye pupil in the bright environment can be converted. The pupil size measurement method as described in claim 8, wherein, after the pupil size measurement step in the bright environment, it further includes: a pupil size measurement step in a dim environment: the pupil size measurement system is changed to be set in a dim environment, and the dim environment is defined as an environment with a brightness of 150±10% lux. In the dim environment, the first aperture is located in the open position and the second aperture is located in the closed position. The left eye positioning area is used to set the left real eye, and the left real eye has the left real eye pupil part. The left eye image is obtained by using the near-infrared light image capture element. At this time, the left eye image has a left real eye dim environment pupil image, and the left real eye dim environment pupil image has a left real eye dim environment pupil image. The pupil size of the left real eye in the dark environment is converted into the actual size of the pupil of the left real eye in the dark environment by using the conversion ratio in the conversion step of the pupil size of the left real eye in the dark environment to the standard size; and when the first aperture is in the closed position and the second aperture is in the open position, the right eye positioning area is used to set the right real eye, and the right real eye has a right real pupil The right eye image is obtained by the aforementioned process. At this time, the right eye image has a right real eye dark environment pupil image, and the right real eye dark environment pupil image has a right real eye dark environment pupil image size. Then, the right real eye dark environment pupil size corresponds to the aforementioned conversion ratio, and the actual size of the right real eye pupil in the dark environment can be converted.

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