Portable eye position luxmeter

Abstract

The invention belongs to the technical field of optical radiation measurement, and particularly relates to a portable eye position luxmeter, which comprises an ambient light sensor and an intelligentcontrol box, wherein a wearing structure of the ambient light sensor comprises a glass clamp type and an ear wearing type; the ambient light sensor is arranged at the eye position and comprises an ADCanalog-to-digital conversion circuit and an adaptive gain circuit; the intelligent control box comprises a microcontroller, an external data flash memory module and a power supply module. The outputend of the ambient light sensor is connected with a microcontroller interface in the intelligent control box, the external data flash memory module is connected with a microcontroller serial port, andthe power supply module supplies power for the ambient light sensor, the microcontroller and the external data flash memory module. According to the invention, the eye position illumination can be continuously measured and recorded for one week, the data can be periodically read out through a storage card for the calculation of the eye position accumulated incident light flux and the distributionof the incident light flux along with time, the spectral sensitivity is matched with the spectral sensitivities V (lambda) of bright vision, and intermediate vision and the like, the matching error is less than 5%.

Description

technical field [0001] The invention belongs to the technical field of optical radiation measurement, in particular to a portable eye position illuminance recorder. Background technique [0002] According to the definition of the International Institute of Illumination (CIE) in 1983, photopic vision refers to an environment with a brightness exceeding 3 cd / m2. At this time, vision is mainly played by cone cells, and the maximum visual response is at 555nm in the blue-green range of the spectrum; dark vision Refers to the environment when the ambient brightness is lower than 10-3 cd / m2. At this time, the rod cells are the main photoreceptor cells, and the peak of the spectral luminous efficiency is about 507nm; intermediate vision is between the brightness of photopic vision and scotopic vision. At this time, the cone and rod cells of the human eye respond at the same time, and as the brightness changes, the activity of the two cells also changes. The spectral sensitivity of...

AI Technical Summary

Problems solved by technology

[0004] At present, there are few measuring instruments for eye position illuminance, and they cannot be portable and worn for a long time

For example, the Chinese patent "Wearable Visual and Non-Visual Light Recorder, Publication No.: CN107870036 A" does not explain the position and fixing method of the sensor probe. In the actual measurement process, the advantage compared with the conventional illuminance meter is not obvious

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