JPWO2016139706A1 - Illumination evaluation apparatus and illumination evaluation method - Google Patents

Abstract

Measures the line-of-sight distance, which is the linear distance between the viewpoint position of an observer who performs a visual task of visually recognizing a visual object placed in an illumination area irradiated with illumination light from an illumination light source, and an arbitrary position on the visual object. A line-of-sight distance measuring unit (10), and an average line-of-sight distance calculating unit (21) that calculates an average line-of-sight distance that is an average value of the line-of-sight distance measured by the line-of-sight distance measuring unit (10) during the line-of-sight work time. A storage unit (30) that stores an evaluation criterion that the burden on the observer's eyes increases as the average line-of-sight distance is shorter, and an average line-of-sight distance calculation unit (21) based on the evaluation criterion stored in the storage unit (30). And an evaluation unit (22) that evaluates the superiority or inferiority of the illumination light from the average line-of-sight distance calculated by (1).

Description

  The present invention relates to an illumination evaluation apparatus and an illumination evaluation method for evaluating illumination light, and a program for executing the illumination evaluation method.

  Conventionally, when an observer performs visual work (reading, etc.) for a certain period of time in an illumination environment, research has been conducted on how the illumination light affects the observer. The method is not known.

  So far, techniques for inspecting the appearance of an observer's object in an illumination environment are known (Patent Documents 1 and 2). The techniques described in Patent Documents 1 and 2 evaluate how an observer sees an object in an illumination environment based on the performance of the visual acuity of the observer, but do not evaluate illumination light.

JP 2001-17392 A JP 2001-87225 A

  In recent years, it has been considered to evaluate the illumination light by evaluating the burden on the eyes under the illumination environment of the observer. In this case, the illumination light is evaluated by measuring the degree of deterioration of the visual function of the tired eyes.

  However, since the conventional evaluation method of illumination light is based on the subjective evaluation of the observer, it cannot be said that the illumination light is appropriately evaluated. In other words, in the subjective evaluation of the observer, the psychological aspect and the physical condition of the observer have a great influence on the evaluation result, and thus the conventional evaluation methods cannot obtain a quantitative and reproducible evaluation result. Moreover, the evaluation can be performed only after the eyes are tired.

  The present invention has been made to solve such a problem, and an illumination evaluation apparatus and an illumination evaluation method capable of obtaining a quantitative and reproducible evaluation result for illumination light before the eyes are fatigued. The purpose is to provide.

  In order to achieve the above object, one aspect of an illumination evaluation apparatus according to the present invention is a viewpoint of an observer who performs a visual task of visually recognizing a visual target object arranged in an illumination area irradiated with illumination light from an illumination light source. A line-of-sight distance measuring unit that measures a line-of-sight distance that is a linear distance between a position and an arbitrary position on the object to be visually recognized, and an average of the line-of-sight distance measured by the line-of-sight distance measuring unit during the visual work time for performing the visual work An average line-of-sight distance calculation unit that calculates an average line-of-sight distance that is a value, a storage unit that stores an evaluation criterion that the burden on the observer's eyes is greater as the average line-of-sight distance is shorter, and the evaluation stored in the storage unit An evaluation unit that evaluates superiority or inferiority of the illumination light from the average line-of-sight distance calculated by the average line-of-sight distance calculation unit based on a reference.

  In addition, according to one aspect of the illumination evaluation method according to the present invention, the viewpoint position of an observer who performs a visual operation for visually recognizing a visual object arranged in an illumination area irradiated with illumination light from an illumination light source and the visual object A line-of-sight distance measuring step for measuring a line-of-sight distance, which is a linear distance to an arbitrary position above, and an average line-of-sight distance for calculating an average line-of-sight distance, which is an average value of the line-of-sight distance measured during the line-of-sight work time. And a calculation step and an evaluation step of evaluating the superiority or inferiority of the illumination light from the average line-of-sight distance based on an evaluation criterion that the burden on the observer's eyes is greater as the average line-of-sight distance is shorter.

  The present invention can be realized not only as the above-described illumination evaluation apparatus and illumination evaluation method, but also as a program for causing a computer to execute the illumination evaluation method, or as a computer-readable recording medium storing the program. You can also

  For illumination light, quantitative and reproducible evaluation results can be obtained before eyes are fatigued.

Drawing 1 is a mimetic diagram showing typically the composition of the lighting evaluation system concerning an embodiment. FIG. 2 is a block diagram showing a basic configuration of the illumination evaluation apparatus according to the embodiment. FIG. 3 is a diagram for explaining an example of a method of measuring a line-of-sight distance in the illumination evaluation apparatus according to the embodiment. FIG. 4 is a diagram showing the relationship between the illuminance on the reading surface (illumination area) and the reading distance (line-of-sight distance). FIG. 5 is a diagram showing the relationship between the reading distance (line-of-sight distance) and the amount of change in the refractive index. FIG. 6 is a flowchart of the illumination evaluation method according to the embodiment. FIG. 7 is a block diagram illustrating a basic configuration of the illumination evaluation apparatus according to the first modification. FIG. 8 is a block diagram illustrating a basic configuration of the illumination evaluation apparatus according to the second modification.

  Embodiments of the present invention will be described below. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, numerical values, components, arrangement positions and connection forms of components, and steps and order of steps shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. In each figure, substantially the same configuration is denoted by the same reference numeral, and redundant description is omitted or simplified.

(Embodiment)
First, the structure of the illumination evaluation system 1 and the illumination evaluation apparatus 100 which concern on embodiment is demonstrated using FIG.1 and FIG.2. Drawing 1 is a mimetic diagram showing typically the composition of the lighting evaluation system concerning an embodiment. FIG. 2 is a block diagram showing a basic configuration of the illumination evaluation apparatus according to the embodiment.

[Lighting evaluation system, lighting evaluation device]
As shown in FIG. 1, the illumination evaluation system 1 includes an illumination evaluation device 100 and an illumination light source 200, and evaluates illumination light emitted from the illumination light source 200. In the present embodiment, the illumination evaluation apparatus 100 evaluates the superiority or inferiority of the illumination light from the illumination light source 200 based on the burden on the eyes of the observer P who performs visual work in the illumination environment of the illumination light source 200.

  As shown in FIG. 1, the observer P views the illumination area (irradiation area) 310 irradiated by the illumination light source 200 from the viewpoint position S (the position of the eyes of the observer P). The viewpoint position S may be set as the center position of both eyes or the position of the dominant eye, or any one of the left and right eyes may be set arbitrarily. As an example, the observer P shown in FIG. 1 is reading as visual work. Specifically, the observer P sits on a chair and visually recognizes a book placed on the desk 300 as an observation target (viewing target) in a state where the head is not fixed by a chin rest or the like, and reads the contents of the book. It is out. In other words, the observer P reads the book irradiated by the illumination light source 200 to view the illumination area 310 (irradiation surface) for a certain time (visual work time).

  The illumination light source 200 irradiates the illumination light L toward the illumination area 310. That is, the area irradiated with the illumination light L from the illumination light source 200 is the illumination area 310. The illumination light source 200 may have a light control function capable of changing the light output, a color control function capable of changing the color temperature or the light color, a light distribution control function capable of changing the light distribution angle, and the like. The illumination light source 200 is a desk light that illuminates the desk 300, for example.

  As illustrated in FIG. 2, the illumination evaluation apparatus 100 includes a line-of-sight distance measurement unit 10, a processing unit 20, and a storage unit 30. The illumination evaluation device 100 in the present embodiment further includes an illumination condition acquisition unit 40 and a visual work time input unit 50.

  The processing unit 20 is a control unit having various control functions, and includes an average line-of-sight distance calculation unit 21 and an evaluation unit 22 in the present embodiment.

  The illumination evaluation apparatus 100 includes, for example, an information processing apparatus 110 such as a notebook computer and a three-dimensional distance sensor 120, but is not limited thereto. The three-dimensional distance sensor 120 includes, for example, an infrared projector and an infrared camera.

[Gaze distance measurement unit]
The line-of-sight distance measuring unit 10 is a line-of-sight distance (a line-of-sight distance (the linear distance between the viewpoint position S of the viewer P who performs the visual task of visually recognizing the visual target object arranged in the illumination area 310) and the arbitrary position B on the visual target object ( (Visual distance) X is measured.

  Here, an example of a method for measuring the line-of-sight distance X will be described with reference to FIG. FIG. 3 is a diagram for explaining an example of a method for measuring the line-of-sight distance X in the illumination evaluation apparatus 100 according to the embodiment.

  As shown in FIG. 3, in the three-dimensional space coordinates, the position O of the infrared camera of the three-dimensional distance sensor 120 is the origin (0, 0, 0), and the coordinates of the viewpoint position S of the observer P are (Xs, Ys, Zs), and (W, H, D) are coordinates of an arbitrary position B of the book that is the visual recognition object (the point of view of the observer P). That is, the horizontal distance from the arbitrary position B of the book to the position O of the infrared camera of the three-dimensional distance sensor 120 is W, the depth is D, and the height is H.

  In this case, the line-of-sight distance X can be obtained by the following equation (1).

  The three-dimensional distance sensor 120 can measure a measurement distance Y that is a linear distance between the own device (three-dimensional distance sensor 120) and the viewpoint S of the observer P by recognizing the eyes of the observer P. That is, the three-dimensional distance sensor 120 can calculate the three-dimensional space coordinates (Xs, Ys, Zs) of the viewpoint position S of the observer P.

  Thus, the line-of-sight distance X is calculated from the above equation (1) using the known depth D and height H values and the coordinates (Xs, Ys, Zs) of the viewpoint position S calculated by the three-dimensional distance sensor 120. Can be calculated. As shown in FIGS. 1 and 3, in this embodiment, since the three-dimensional distance sensor 120 is arranged in front of the viewpoint position S, W = 0.

[Average line-of-sight distance calculation unit]
The average line-of-sight distance calculation unit 21 calculates an average line-of-sight distance Xa that is an average value of the line-of-sight distance X measured by the line-of-sight distance measurement unit 10 during the visual work time for performing the visual work. In the present embodiment, the average line-of-sight distance calculation unit 21 calculates the average line-of-sight distance Xa using the time input by the visual work time input unit 50 as the visual work time. Specifically, the average line-of-sight distance Xa can be calculated as an average value of a plurality of line-of-sight distances X measured within the visual work time from the first time to the second time. For example, it is possible to calculate the average line-of-sight distance Xa for 60 minutes by calculating the line-of-sight distance X of the observer P every second with a visual task time of 60 minutes.

  At this time, the observer P may temporarily interrupt the visual work within the visual work time. In this case, the line-of-sight distance X may deviate greatly from the original value. For this reason, when calculating the average line-of-sight distance Xa, the line-of-sight distance X exceeding the set range may be excluded. That is, when an upper limit value and a lower limit value are set in advance, and the calculated line-of-sight distance X exceeds the upper limit value or falls below the lower limit value, the average line-of-sight distance Xa is calculated out of the set range. The line-of-sight distance X may be excluded.

  The processing unit 20 stores the calculated average line-of-sight distance Xa in the storage unit 30 in association with the illumination condition acquired by the illumination condition acquisition unit 40. Further, the visual work time for calculating the average visual line distance Xa may not be input by the visual work time input unit 50, and the visual work time for calculating the average visual line distance Xa is a predetermined value set in advance. (Set value) may be used.

[Evaluation Department]
The evaluation unit 22 illuminates light from the average line-of-sight distance Xa calculated by the average line-of-sight distance calculation unit 21 based on the evaluation criterion stored in the storage unit 30 that the burden on the observer's eyes increases as the average line-of-sight distance decreases. Evaluate the superiority or inferiority of L. For example, it is evaluated that the shorter the average line-of-sight distance is, the greater the burden on the eyes is, and the poorer the lighting environment is. The longer the average line-of-sight distance is, the lower the burden on the eyes is. The determination that the average line-of-sight distance is short or long may be made with respect to a predetermined reference value (for example, 30 cm) or may be made in comparison with the average line-of-sight distance of other visual tasks.

  In the present embodiment, the evaluation unit 22 evaluates the superiority or inferiority of the illumination conditions as the superiority or inferiority of the illumination light L. Specifically, the evaluation unit 22 evaluates the superiority or inferiority of the illumination condition associated with the average line-of-sight distance Xa. In this case, the evaluation unit 22 evaluates the superiority or inferiority of the illumination condition of the illumination light L acquired by the illumination condition acquisition unit 40. If the illumination condition is predetermined, the evaluation unit 22 acquires the illumination condition from the illumination condition acquisition unit 40. do not have to.

  Illumination conditions of the illumination light L include, for example, illuminance, color temperature, color rendering, wavelength, illuminance gradient, flicker degree (flicker frequency), and three primary colors of light (R, G, B) in the illumination region 310. Is at least one of

  In addition, although the process part 20 in this Embodiment performs the process for performing the average gaze distance calculation part 21 and the evaluation part 22, it is not restricted to this process, for example, the illumination evaluation apparatus 100 performs, for example. An operation necessary for processing may be performed or information may be temporarily stored.

[Storage unit]
The memory | storage part 30 has memorize | stored the evaluation criteria that the burden of an observer's eyes is so large that an average gaze distance is short. The storage unit 30 further stores the illumination condition acquired by the illumination condition acquisition unit 40 and the average visual line distance Xa calculated by the average visual line distance calculation unit 21 in association with each other.

  Further, the storage unit 30 stores the line-of-sight distance X measured by the line-of-sight distance measurement unit 10, stores the average line-of-sight distance Xa calculated by the average line-of-sight distance calculation unit 21, or illumination light evaluated by the evaluation unit 22. The evaluation result of L may be stored, the lighting condition input by the user from the lighting condition acquisition unit 40 may be stored, or the visual work time input by the user from the visual work time input unit 50 may be stored.

  Furthermore, the memory | storage part 30 may memorize | store other information, and may memorize | store a series of programs etc. required for the process which the illumination evaluation apparatus 100 performs.

  The storage unit 30 is a display as a logical structure. Actually, the storage unit 30 may be configured by the same hardware or may be configured by separate divided hardware. The storage unit 30 is configured by a main storage device including a volatile storage device such as SRAM or DRAM, or an auxiliary storage device including a nonvolatile storage device such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, for example. Is done.

[Lighting condition acquisition unit]
The illumination condition acquisition unit 40 acquires the illumination condition of the illumination light L in the illumination area 310. The acquired illumination condition is input to the processing unit 20. In the present embodiment, the illumination condition acquisition unit 40 is an input unit that inputs illumination conditions according to a user operation, and is a user interface such as a keyboard, a mouse, a touch panel, or the like.

  In this case, the illumination light source 200 may have a function of setting the illumination condition input to the illumination condition acquisition unit 40 by a user operation and irradiating the illumination light L under the set illumination condition.

  The lighting condition acquisition unit 40 is not limited to the case where the user inputs, but may automatically acquire a predetermined lighting condition that is set in advance without the user inputting the lighting condition. In addition, when the illumination condition is determined in advance, the illumination condition acquisition unit 40 may not be provided.

[Visual work time input section]
The visual work time input unit 50 inputs time (visual work time) for the observer P to perform visual work. The input visual work time is input to the average visual distance calculation unit 21 and used for calculating the average visual distance Xa. The visual work time input unit 50 is input means for inputting the visual work time in advance according to a user operation, and is a user interface such as a keyboard, a mouse, a touch panel, or the like.

  When the visual work time is a predetermined setting value, the visual work time input unit 50 may not be provided.

[Evaluation criteria]
As described above, in the present embodiment, as an evaluation criterion for evaluating the superiority or inferiority of the illumination light L, a criterion that the burden on the observer's eyes is greater as the average line-of-sight distance is shorter is used. It is based on the following experimental results conducted by the person.

  This inventor experimented about the relationship between the illumination conditions of illumination light, and the burden of eyes. In this experiment, reading was performed as visual work. In addition, “illuminance” is used as an example of illumination conditions of illumination light.

  Specifically, as shown in FIG. 1, a subject sitting on a chair read a book placed on an illumination area 310 (reading surface) on a desk 300 in an illumination environment with a constant illuminance. In this case, each subject is asked to perform a 60-minute visual work (reading) after measuring the refractive index of the eye before the visual work (before reading), and again after the visual work (after reading). The refractive index was measured. That is, the amount of change in the refractive index before and after visual work for a certain time was obtained. Further, during the visual operation, the visual distance X (reading distance) was measured at intervals of 1 second, and the average visual distance Xa was calculated.

  This was performed for each case where the illuminance of the illumination light L was 200 lx, 900 lx, and 1400 lx. That is, an experiment was performed on three types of illumination light sources 200 (desk lights). In this experiment, the line-of-sight distance X was measured by the same method as described above, and the illuminance was measured by an illuminometer. The refractive index of the subject's eyes was measured with an autorefractometer (refractive power measuring device). The number of subjects was 18 and the visual acuity of all subjects was 1.0.

  By this experiment, the results shown in FIGS. 4 and 5 were obtained. FIG. 4 is a diagram showing the relationship between the illuminance on the reading surface (illumination area) and the reading distance (line-of-sight distance), and shows the influence of the lighting environment on the line-of-sight distance. FIG. 5 is a diagram showing the relationship between the reading distance (line-of-sight distance) and the amount of change in the refractive index, and shows the relationship between the reading distance and the eye burden. 4 and 5, the reading distance (line-of-sight distance) indicates an average value (average line-of-sight distance) over 60 minutes.

  As shown in FIG. 4, it can be seen that the higher the illuminance in the illumination area, the longer the line-of-sight distance, and conversely, the smaller the illuminance in the illumination area, the shorter the line-of-sight distance. That is, it can be seen that the higher the illuminance, the more correct the posture of the observer.

  Further, as shown in FIG. 5, the longer the line-of-sight distance is, the smaller the amount of change in the refractive index of the eye before and after reading, whereas the shorter the line-of-sight distance is, the larger the amount of change in the refractive index of the eye before and after reading. I understand that

  A large amount of change in the refractive index of the eyes means that the burden on the eyes is large. This point will be described below.

  The person focuses the eyes and visually recognizes the object by focusing the light entering the eyes from the object on the retina by adjusting the swelling of the crystalline lens. In the lens, the bulge is adjusted by the ciliary muscle, and the refractive index of the eye is adjusted.

  For example, when the eye is focused on a distant object, the eye has a ciliary muscle that relaxes and the lens becomes thin. In this case, the burden on the eyes is small because the ciliary muscle is relaxed even if the object in the distance is continuously viewed.

  On the other hand, when a nearby object is in focus, the eyes become tense at the ciliary muscle and thicken the lens. In this case, if you keep looking at a nearby object, the ciliary muscles are tense, so the burden on the eyes is large. The ciliary muscles are constantly tense while reading a nearby object for a long time by reading, so the tension of the ciliary muscles remains unrelieved after reading and has a high refractive index. It becomes a state (pseudomyopia). In other words, a large amount of change in the refractive index before and after reading means that the burden on the eyes is large.

  Therefore, as shown in FIG. 5, the shorter the line-of-sight distance, the larger the amount of change in the refractive index of the eye before and after the reading of the subject. This means that the shorter the line-of-sight distance, the greater the burden on the eye.

  In the present embodiment, illumination light (illumination environment) is evaluated using this as an evaluation criterion.

[Lighting evaluation method]
Next, the illumination evaluation method according to the embodiment will be described using FIG. 6 with reference to FIGS. FIG. 6 is a flowchart of the illumination evaluation method according to the embodiment.

  As shown in FIG. 6, the illumination evaluation method according to the present embodiment includes a line-of-sight distance measurement step S30, an average line-of-sight distance calculation step S40, a storage step S50, and an evaluation step S60. In this Embodiment, illumination condition acquisition step S10 and visual operation time input step S20 are further included.

  In the illumination condition acquisition step S10, the illumination condition of the illumination light L in the illumination area 310 is acquired. The acquired illumination conditions are input to the processing unit 20.

  In the visual work time input step S20, the visual work time of the observer P is input. The input visual work time is input to the average visual line distance calculation unit 21.

  In the line-of-sight distance measurement step S30, the viewpoint position S of the observer P who performs a visual task of visually recognizing the visual target object arranged in the illumination area 310 irradiated with the illumination light L from the illumination light source 200 and an arbitrary on the visual target object The line-of-sight distance X, which is the linear distance from the position B, is measured. The line-of-sight distance X can be measured by the above measurement method. The measured line-of-sight distance X is input to the average line-of-sight distance calculation unit 21.

  In the average line-of-sight distance calculation step S40, an average line-of-sight distance Xa that is an average value of the line-of-sight distance X measured during the line-of-sight work time for performing the visual work is calculated. The average line-of-sight distance Xa can be calculated by the above method.

  In storage step S50, the acquired illumination condition and the calculated line-of-sight distance Xa are stored in association with each other.

  In the evaluation step S60, the superiority or inferiority of the illumination light L is evaluated from the average line-of-sight distance Xa based on an evaluation criterion that the burden on the eyes of the observer P increases as the average line-of-sight distance Xa is shorter. For example, as the superiority or inferiority of the illumination light L, the superiority or inferiority of the illumination condition associated with the average line-of-sight distance Xa is evaluated.

  The evaluation result of the illumination light L (illumination condition) may be displayed on a display unit (not shown) such as a display.

  Note that the order of the above steps is not limited to the order shown in FIG. For example, you may perform illumination condition acquisition step S10 after visual operation time input step S20. Moreover, not all of the above steps are necessary. For example, the illumination condition acquisition step S10 and the visual work time input step S20 may be omitted.

[Summary]
As described above, the illumination evaluation system 1 and the illumination evaluation apparatus 100 according to the present embodiment perform the visual task of visually recognizing the visual condition object arranged in the illumination area 310 to which the illumination light L from the illumination light source 200 is irradiated. The line-of-sight distance measurement unit 10 that measures the line-of-sight distance X, which is the linear distance between the viewpoint position S of the subject and the arbitrary position B on the visual recognition object, and the average of the line-of-sight distance X measured by the line-of-sight distance measurement unit 10 during the visual work time An average line-of-sight distance calculation unit 21 that calculates the average line-of-sight distance Xa, a storage unit 30 that stores an evaluation criterion that the burden on the eyes of the observer increases as the average line-of-sight distance XAa is shorter, and is stored in the storage unit 30. And an evaluation unit 22 that evaluates the superiority or inferiority of the illumination light from the average line-of-sight distance Xa calculated by the average line-of-sight distance calculation unit 21 based on the above evaluation criteria.

  As described above, in the present embodiment, the average line-of-sight distance Xa during the visual work for a predetermined time on the illumination area 310 by the arbitrary illumination light source 200 is calculated, and the evaluation standard regarding the burden on the eyes of the observer in the illumination environment is used. Based on the average line-of-sight distance Xa, the superiority or inferiority of the illumination light L is evaluated.

  Thereby, quantitative and reproducible evaluation results can be obtained for the illumination light L (illumination environment) of the illumination light source 200 before the eyes are fatigued. That is, the superiority or inferiority of the illumination light source 200 can be evaluated quantitatively with good reproducibility.

  In addition, the evaluation result of the illumination light L or the illumination light source 200 can be represented by a score (for example, 50 points, 80 points, 100 points, etc.), a rank (for example, the number of A to E, the number of stars, or the like). . Further, by reflecting the evaluation result (score etc.) in the price of the illumination light source 200, the consumer can easily select an illumination light source (lamp, luminaire, etc.) suitable for himself.

  Moreover, in this Embodiment, the illumination condition acquisition part 40 which acquires the illumination condition of the illumination light L in the illumination area | region 310 is further provided, and the evaluation part 22 is from the illumination condition acquisition part 40 as superiority / inferiority of the illumination light L. The superiority and inferiority of the acquired lighting conditions are evaluated.

  Thus, by providing the illumination condition acquisition unit 40, it is possible to evaluate the superiority or inferiority of the acquired illumination condition. Thereby, it becomes possible to select and evaluate a necessary illumination condition.

  Further, in the present embodiment, the storage unit 30 stores the illumination condition acquired by the illumination condition acquisition unit 40 and the average visual line distance Xa calculated by the average visual line distance calculation unit 21 in association with each other. Then, the evaluation unit 22 evaluates the superiority or inferiority of the illumination condition associated with the average line-of-sight distance Xa.

  Thus, by associating the illumination condition acquired by the illumination condition acquisition unit 40 with the average visual line distance Xa calculated by the average visual line distance calculation unit 21, it is possible to obtain a more accurate evaluation result of the appropriate illumination condition. it can.

  In the present embodiment, the visual work time input unit 50 for inputting the time for performing visual work is further provided, and the average line-of-sight distance calculation unit 21 calculates the time input by the visual work time input unit 50 as visual work. The average line-of-sight distance Xa is calculated as time.

  Thus, by providing the visual work time input unit 50, the evaluation results can be arranged for each work time. Thereby, the accuracy of the evaluation result is improved.

(Modification 1)
Next, Modification 1 will be described with reference to FIG. FIG. 7 is a block diagram illustrating a basic configuration of the illumination evaluation apparatus according to the first modification.

  The illumination evaluation apparatus 100A according to this modification has a configuration in which an illumination condition measurement unit 60 that measures illumination conditions is further added to the illumination evaluation apparatus 100 according to the above embodiment.

  For example, the illumination condition measuring unit 60 measures the illumination condition in the illumination area 310 irradiated by the illumination light source 200. Specifically, the illumination condition measuring unit 60 measures illumination conditions such as illuminance, color temperature, color rendering, wavelength, illuminance gradient, flickering degree (flicker frequency), or the three primary colors of light in the illumination area 310. The illumination condition is input to the illumination condition acquisition unit 40.

  That is, the illumination condition acquisition unit 40 acquires the illumination condition from the illumination condition measurement unit 60 and inputs the illumination condition to the processing unit 20. The illumination condition measurement unit 60 includes various measuring instruments, sensors, and the like, and measures illumination conditions at a plurality of locations on the irradiation surface 12.

  As described above, the illumination condition acquisition unit 40 is not limited to the configuration in which the illumination condition is acquired by a user operation as in the above-described embodiment, and the illumination condition is directly acquired from various measuring instruments as an electrical signal. It may be configured.

  As described above, according to this modification, the illumination condition measurement unit 60 is provided, so that the illumination condition acquisition unit 40 can automatically input the illumination condition measured by the illumination condition measurement unit 60 to the processing unit 20. . Thereby, the input accuracy of the illumination conditions is improved, and the evaluation of the illumination light L can be simplified.

(Modification 2)
Next, Modification 2 will be described with reference to FIG. FIG. 8 is a block diagram illustrating a basic configuration of the illumination evaluation apparatus according to the second modification.

  The illumination evaluation apparatus 100B according to this modification has a configuration in which an observer information input unit 70 for inputting observer information regarding the observer P is further added to the illumination evaluation apparatus 100 according to the above embodiment. The observer information is, for example, the age, sex, visual acuity, presence / absence of glasses, an identifier, and the like of the observer P. The observer information input unit 70 is a user interface such as a keyboard, a mouse, and a touch panel.

  In the present modification, the storage unit 30 stores the observer information input by the observer information input unit 70 in association with the average line-of-sight distance Xa calculated by the average line-of-sight distance calculation unit 21.

  As described above, according to the present modification, by providing the observer information input unit 70, the evaluation results can be arranged for each observer information. Thereby, the accuracy of the evaluation result is improved.

(Other variations)
As mentioned above, although the illumination evaluation system, the illumination evaluation apparatus, the illumination evaluation method, and the like according to the present invention have been described based on the embodiments and the modified examples, the present invention is limited to the above-described embodiments and modified examples. is not.

  For example, in the above-described embodiment and modification, the illumination area 310 is a horizontal plane, but the illumination area 310 is not limited to a horizontal plane and may be a vertical plane. For example, this is the case where the observer P visually recognizes character information on the surface of the vertical signboard (illumination area 310). In this case, the illumination light source 200 is installed obliquely above and in front of the illumination area (irradiation surface) 310 that is a vertical surface, and irradiates the illumination light L toward the illumination area 310. Then, for example, the observer P stands up and looks at the illumination area 310 irradiated by the illumination light source 200 from the viewpoint S in a state where the head is not fixed.

  Moreover, in the said embodiment and modification, an illumination evaluation apparatus is a display part (not shown) for displaying the evaluation result of illumination light L (illumination conditions), or the evaluation result of illumination light L (illumination conditions). May be provided with a speaker (not shown) for outputting the sound.

  Moreover, in the said embodiment and modification, the illumination evaluation apparatus considers the power consumption of an illumination light source, etc., and evaluates illumination light (illumination light source) comprehensively with the burden of the eyes of the observer P. Good.

  In addition, the form obtained by making various modifications conceived by those skilled in the art with respect to the above-described embodiments and modifications, or arbitrarily combining the components and functions in the above-described embodiments without departing from the gist of the present invention Embodiments realized by this are also included in the present invention.

  In the above description, each component in the processing unit 20 may be a circuit. These circuits may constitute one circuit as a whole, or may be separate circuits. Each of these circuits may be a general-purpose circuit or a dedicated circuit.

  The processing described as the operation of the illumination evaluation apparatus 100 such as the processing unit 20 may be executed by a computer. For example, a computer executes each of the above processes by executing a program using hardware resources such as a processor (CPU), a memory, and an input / output circuit. Specifically, each process is executed by the processor obtaining data to be processed from a memory or an input / output circuit or the like and calculating the data, or outputting the calculation result to the memory or the input / output circuit or the like. .

  In addition, a program for executing each of the above processes may be recorded on a non-transitory recording medium such as a computer-readable CD-ROM. In this case, the computer reads the program from the non-temporary recording medium and executes the program to execute each process. For example, the method in the lighting system can be realized as a program that causes a computer to execute the method, or can be realized as a computer-readable recording medium that records such a program.

DESCRIPTION OF SYMBOLS 1 Illumination evaluation system 10 Gaze distance measurement part 21 Average gaze distance calculation part 22 Evaluation part 30 Storage part 40 Illumination condition acquisition part 50 Visual operation time input part 60 Illumination condition measurement part 70 Observer information input part 100, 100A, 100B Illumination evaluation Device 200 Illumination light source 300 Desk 310 Illumination area

Claims (9)

A line-of-sight distance, which is a linear distance between a viewpoint position of an observer who performs a visual operation for visually recognizing a visual target object arranged in an illumination area irradiated with illumination light from an illumination light source and an arbitrary position on the visual target object, A line-of-sight distance measurement unit to measure,
An average line-of-sight distance calculation unit that calculates an average line-of-sight distance that is an average value of the line-of-sight distance measured by the line-of-sight distance measurement unit during the line-of-sight work time;
A storage unit that stores an evaluation criterion that the burden on the observer's eyes is greater as the average line-of-sight distance is shorter;
An illumination evaluation apparatus comprising: an evaluation unit that evaluates superiority or inferiority of the illumination light from the average line-of-sight distance calculated by the average line-of-sight distance calculation unit based on the evaluation criterion stored in the storage unit. An illumination condition acquisition unit that acquires an illumination condition of the illumination light in the illumination area;
The illumination evaluation apparatus according to claim 1, wherein the evaluation unit evaluates superiority or inferiority of the illumination condition as superiority or inferiority of the illumination light. The storage unit further stores the illumination condition acquired by the illumination condition acquisition unit in association with the average line-of-sight distance calculated by the average line-of-sight distance calculation unit,
The illumination evaluation apparatus according to claim 2, wherein the evaluation unit evaluates superiority or inferiority of the illumination condition associated with the average line-of-sight distance. It further comprises an illumination condition measuring unit for measuring the illumination condition,
The illumination evaluation device according to claim 1, wherein the illumination condition acquisition unit acquires the illumination condition from the illumination condition measurement unit. The illumination condition is at least one of illuminance, color temperature, color rendering properties, wavelength, illuminance gradient, flickering degree, and three primary colors of light in the illumination area. The illumination evaluation apparatus as described. A visual work time input unit for inputting a time for performing the visual work;
The lighting evaluation device according to claim 1, wherein the average line-of-sight distance calculation unit calculates the average line-of-sight distance using the time input by the visual work time input unit as the visual work time. An observer information input unit for inputting observer information related to the observer;
The illumination evaluation apparatus according to any one of claims 1 to 6, wherein the storage unit stores the observer information input by the observer information input unit in association with the average line-of-sight distance. A line-of-sight distance, which is a linear distance between a viewpoint position of an observer who performs a visual operation for visually recognizing a visual target object arranged in an illumination area irradiated with illumination light from an illumination light source and an arbitrary position on the visual target object, Gaze distance measurement step to measure,
An average line-of-sight distance calculating step of calculating an average line-of-sight distance that is an average value of the line-of-sight distance measured during the line-of-sight work time;
And an evaluation step for evaluating the superiority or inferiority of the illumination light from the average line-of-sight distance based on an evaluation criterion that the shorter the average line-of-sight distance is, the greater the burden on the observer's eyes.   A program for causing a computer to execute the illumination evaluation method according to claim 8.

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