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PHOTOMETRY (Photo courtesy of NASA)	Photometry is the radiometric measurement of light as perceived by the human eye. A photopic filter passes the wavelengths of light in proportion to the eye's response. International Light's proprietary photopic filters consist of several elements designed so as to match the CIE photopic response curve to better than 1% at all wavelengths. Most safety regulations for measurement of illumination are photopic measurements and require the integration of a photopic filter in the system.	PHOTORESIST	Photoresist is an organic polymer which becomes soluble when exposed to ultraviolet light. It contains a light-sensitive substance whose properties allow image transfer onto a PCB board. It is used in many applications within various industries such as semiconductor, biomedical engineering, holographic, electronics, and nanofabrication. As an example, photoresist is used to help define circuit patterns during chip fabrication in the semiconductor industry. Using photoresist prevents etching or plating of the area it covers (this is also known as resist).
RADIOMETRY	Radiometry is the measurement of optical radiation across the entire optical radiation spectrum (ultraviolet, visible and infrared). Radiometric applications include industrial, environmental, space, clinical, agriculture, and defense. Radiometers can be used for anything from UV curing to photobiology to printed circuit board and photostability testing.	PHOTOTHERAPY	Phototherapy is the use of light to cure ailments. Typical applications are in the treatment of skin diseases such as psoriasis and in the area of prenatal care, hyperbilirubinemia. As much of the treatments for skin diseases involves the use of UVA and UVB radiation, it is critical to correctly monitor the dosage. Over exposure to UV light can cause severe sunburn and cancer.
UV CURING	Ultraviolet radiation can induce chemical and or physical changes in certain materials. This ability is used in many applications. These include hardening clear coatings on wood products, curing powdered coatings on metal products, activating adhesives and inks in the graphics industries and selectively etching circuitry in the electronics industry. Each application has its own curing configuration. Photoreactive products can be made to respond to only a narrow specific band of UV radiation, optimized for the materials optical transmission and absorption properties.	SOLAR UV (Photo courtesy of freeimage.co.uk)	UV-B is a band of ultraviolet radiation with wavelengths from 280-315 nanometers produced by the Sun. UV-B refers to a specific portion of the sun’s energy reaching the earth’s surface. This type of radiation accounts for only a small portion of the electromagnetic spectrum but it has a unusually large photobiological effect. Both plants and animals are affected by increases in UV-B radiation. UV radiation plays a role in the degradation of all polymeric materials as well as biological systems. It also acts as a germicide, a fungicide, and a batericide in agriculture and biological systems. UV-B radiation is responsible for a wide range of damaging human and animal health effects, primarily related to the skin (skin cancers), eyes (cataracts), and the immune system. Possible eye damage can result from high doses of UV light, particularly to the cornea which easily absorbs UV light.
GERMICIDAL	UV irradiation is an effective method of killing a broad range of microbes. In essence, the UV radiation breaks the molecular bonds in the organism’s DNA. The most effective wavelength for accomplishing this is 263nm; however, the very intense 254nm output from low pressure Hg lamps is also very effective, as well as broader spectral output from medium pressure UV lamps.	LED MEASUREMENT Fiber Optic	Intensity measurement of LED Design for dealing with intense heat and UV radiation in a minimum amount of space.
PHOT0BIOLOGY	Photobiology studies the interactions of light with living organisms. This application encompasses a number of areas including environmental photobiology, UV photobiology (studying the effects of ultraviolet radiation on plants, animals and humans, which has become an urgent concern of late), and photomedicine (using light to improve health), to name a few examples.	UV HAZARD	International Light carries several instrument systems designed for use in measuring optical radiation hazard.
Relative Spectral Responsivity of IL Laser, Laser Diode and Fiber Optic Detectors	LASER POWER Radiometric and Photometric Laser Power measurement ..... designed for simple laser power measurements in the visible and near IR that can be used even by non-technical personnel.