Eye, sensitivity

Eor LEDs utilized in visible/display appHcations, the human eye serves as the detector of radiation. Thus a key measure of performance is luminous efficiency which is weighted to the eye sensitivity (CIE) curve. The relative eye sensitivity, V (L), peaks in the green at A 555 nm where it possesses a value of 1.0. It drops sharply as the wavelength is shifted to the red or blue, reaching a value of 0.5 at 510 and 610 nm. The luminous efficiency, in units of Im/W, of an LED is given by equaton 11 ... 

Aldehydes Glutaraldehyde Slight pH8 Respiratory complaints and contact dermatitis reported Eyes, sensitivity OES 0.2 ppm/0.7 mg rrr, tOmin only Non-corrosive, useful for heat sensitive instruments... 

Light is the primary carrier of photosynthetic energy and also the initial producer of natural food colorants. To speak about the color of an object is to speak simultaneously about the illuminating light source, light transmitting medium, object properties, eye sensitivity, and conventions about color scales. Teleologically viewed, food color has two ambivalent main functions ... 

Glutaraldehyde Formaldehyde Slight Moderate pH 8 Respiratory complaints and contact dermatitis reported Eyes, sensitivity OES 0.2 ppm/0.7 mg/m3, 10 min only Respiratory distress, dermatitis MEL 2ppm/2.5 mg/m3, 10 min and 8 h Non-corrosive, useful for heat-sensitive instruments Use in well-ventilated area. Gloves, goggles and apron worn for preparation... 

However, color cannot be studied without considering the human sensory system. Perception of color is related to three factors spectral composition of light source, physical object characteristics, and eye sensitivity. Fortunately the characteristic of... 

An accurate and convenient configuration for measuring luminous efficiency from OLEDs/PLEDs is shown in Fig. 4.5. Because the luminous efficiency strongly depends on the OLED/PLED emission spectrum (even for constant quantum efficiency), an eye-sensitivity filter is mounted directly onto the surface of the calibrated photodiode (see Fig. 4.4) [15],... 

With a strong light source, the null can be detected by eye. Sensitivity is increased by using a photomultiplier detector and the sensitivity is then limited by that of the divided circles in which the optics are mounted. However, finding repeated nulls is a laborious process, because it involves iterative approach to the null by successive adjustments to two divided circles. It is also very time-consuming, so that dynamic measurements, except on a very long time scale, are impossible. The process can now be automated, however, making it feasible to record several points per second. 

For the red-emitting phosphor (niginally (Zn,Cd)S Ag and Znin> been used. After the prediction that the led emission sh emission around 6l0 nm [2], it took another 10 proposed YVO4 Eu as the red phosph material has already been discussed b later it was replaced by YiOjSiEu wi lattice will reappear in the chapter on X-i proposed Y2(W04>3 Eu because of its 1 The great succes of the Eu luminescei This shows the eye sensitivity curve which a the emission spectra of a Eu -activated phos is clear that the main part of the emission of th>... 

LD50 - oral, dermal. Inhalation Irritation - dermal, eye Sensitization Delayed neurotoxicity... 

Moderately irritant to skin and eyes. Sensitization may occur. Investigations on mutagenic or carcinogenic effects show controversial results (e.g. Moriya et al., 1983 Barrueco de la Pena, 1988 Heil et al, 1991). 

Not irritant to the skin, but severely irritant to the eyes. Sensitization may occur. 

Strong irritation on the eye. Sensitization possible through skin contact. 

Both active agents do not cause skin irritation, however they are mildly irritant to eyes. Sensitization has not been observed. 

In tests with rabbits the product proved to be corrosive to skin and eyes. Sensitization The product is classified as a skin sensitizer. 

Toxic by inhalation of sprays or aerosols. Irritant to skin and mucous membranes strongly irritant (corrosive) to the eyes. Sensitization possible by skin contact. 

Only moderately irritant to the skin, however, of irritating effect to mucous membranes and eyes. Sensitization possible through skin contact. 

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