The polychromator which combined the single diffraction grating and the optical detector array has spread through lighting and the light source field by using spectrometry as the equipment which can be performed easily. However, stray light reduction which occurs from structure in a UV wavelength region was a subject. Especially measurement accuracy was not acquired when spectrometry in UV region, such as evaluation of the actinic UV hazard for skin and eye for the light source, was performed especially. Since the measurement light of the cause itself is weak in an ultraviolet region compared with a visible and infrared radiation, the influence of the stray light becomes large and it is because ultraviolet spectrometry accuracy falls. The technology of stray light reduction of a polychromator is introduced in this paper. It is the technology of using the optical feature of the polychromator that special distribution of the stray light in the spectrometer does not change, and aiming at stray light reduction by considering a part of optical ditector array as a stray light monitor.
In the saury fishing, incandescent lamps are usually used for a fishing light. However, there are problems of the conventional fishing lights using incandescent lamps . First, electric power consumption is large. And the incandescent lamps are very inefficient, because much infrared light is included. Furthermore, life time is short and there is a problem of a lot of heat generation. Therefore, we attempted the development of highly efficient fishing lights using LEDs for saury fishing. We designed the combination of various LEDs for a fishing light, based on the spectral luminous efficacy of a Pacific saury. We performed the saury-fishing experiments by using the LED fishing lights, and comparable catch of Pacific saury was achieved by approximately 55% electric power by using both LED poles and incandescent lamp poles. Moreover, we attempted the development of LED fishing lights for squid, and it was found that comparable catch was achieved by lower electric power than that of conventional fishing lights.
Recent times have reported an increase a problem about production center camouflage or freshness such as beef, rice, grains and vegetables, and so on. By a DNA analysis or a genetic test the distinction of production center will be available. But it will cost much, it will take longer time to inspect, it is a destructive testing, therefore it is difficult to inspect all quantity of those. In this paper, we chose "soy beans" as a sample. Soy beans are very familiar with Japanese people. Japanese consumes soy beans as soy source, tofu, miso (including miso-soup), or natto and so on. There are many quantities of imported soy beans form foreign country. This may cause the production center camouflage problem. We have examined about the fluorescence light by irradiating UV light to the soy beans. We found fluorescence spectrum shows specific feature to each sample. To investigate deeply, excitation emission matrix (hereafter EEM) measurement is effective and important. From the results of each EEM, features are specific to the sample. This means that the difference of production center of sample may cause the difference of EEM feature. These results could be combined with the production center of those. We will discuss it here.
Artificial optics for plants has recently been developed and used in Japanese factories, where light emitting diodes (LED) maintained by conventional fluorescent lamps are used to advance plant production. This report introduces; (1) the use of LED lighting as a light source for plant growth, as well as (2) the photosynthesis that occurs in these factories, (3) the difference between fluorescent tube-type LED lighting and fluorescent lamps as illuminators, (4) the implementation of fluorescent tube-type LED lighting in plant factories, (5) the development of techniques for effectively using this lighting, and (6) how the practice can reduce costs.