Abstract:
A photodetector of the invention is characterized by having a plurality of detector elements that are arranged over a light-transparent substrate and are connected in parallel. A foldable portable communication tool having two display portions of the invention is characterized by including one photodetector which includes a plurality of detector elements connected in parallel.
Abstract:
A system configured to monitor ambient illumination experienced by a subject. In one embodiment, the system comprises an illumination sensor, a timer, and a storage module. The illumination sensor is configured to monitor an intensity of ambient illumination within two or more wavelength ranges by generating one or more output signals that convey information related to the intensity of ambient illumination within the two or more wavelength ranges. The timer is configured to indicate the passage of periods of time. The storage module is configured to store information related to the intensity of ambient illumination within the two or more wavelength ranges, as conveyed by the one or more output signals, for individual periods of time. The system is portable to be carried by the subject.
Abstract:
A polariscope that measures stress in glass and that is adapted to be hand-carried includes a lightweight, C-shaped housing with a sequential arrangement of a battery-powered LED light source, a first polarizer, a full wave plate at one distal end, and a second polarizer at a second distal end. The housing includes a hand-grip that houses a battery, where the battery is selectively connected to the LED light source with a switch carried on the hand-grip. The sequential arrangement of light source, first polarizer and full wave plate at the first distal end is less than two inches thick. The polariscope weighs less than two pounds and does not require an external power source.
Abstract:
An ultraviolet ray measuring method using an ultraviolet ray receiving element having a specific spectral sensitivity. The method includes: estimating an estimated value of an entire region from the spectral sensitivity of the ultraviolet ray receiving element and a solar spectral radiation spectrum; estimating an estimated value of a specific region from a specific action curve and the spectral sensitivity and the solar spectral radiation spectrum; and determining specific ultraviolet ray information by, on the basis of the estimated value of the entire region and the estimated value of the specific region, correcting an actually measured value which is measured by the ultraviolet ray receiving element. Further, specific ultraviolet information, which is obtained on the basis of sun altitude information, is also corrected.
Abstract:
A method for providing sunlight exposure data is provided by detecting and collecting sunlight data for analysis, classification and communication to a user. The sunlight exposure data is communicated to a user in the form of alpha, numeric or graphical elements through a local display component or data cable to a remote device capable of receiving and displaying the data.
Abstract:
The system comprises a main body unit 4 which has a first terminal 7 and a head unit 6 which has a second terminal 9 attachable to and detachable from the first terminal 7 and which is attachable to and detachable from the main body unit 4. The head unit 6 has a photosensor 18 connected to the second terminal 9 and adapted to generate photocurrent according to incident optical power, and a capacitor 20 connected to the photosensor 18. The main body unit 4 has a charging circuit 31 connected to the first terminal 7 and being capable of charging the capacitor 20 while the first terminal 7 is coupled to the second terminal 9, and a reading circuit 31 capable of reading a voltage of the capacitor 20 while the first terminal 7 is coupled to the second terminal 9. The capacitor 20 is discharged as the photocurrent is generated.
Abstract:
A photometric instrument having two photoelectric cells coupled to a common moving coil meter, one of said cells being arranged within a casing to measure, in conjunction with an optical viewing system, a small viewing angle, and the other of said cells being adapted to be used externally of said casing to measure illumination and eventual luminance within a large viewing angle. The pointer of said coil meter is common to two reading scales one of which can be viewed through the optical view system and the other of which can be viewed from a position external of said casing.