Knowledge base
Troland (Td)
Troland (Td) is a measure of the light stimulation entering the eye, taking into account both the luminance of the light source and the size of the pupillary aperture. It...
Read moreThreshold Increment (TI)
Threshold Increment (TI) is a measure of the eye's sensitivity under different lighting conditions, particularly in situations with scattered light or slight glare . It is often used in visual...
Read moreMesopic vision
Mesopic vision is the transitional mode between photopic (daylight) and scotopic (night) vision. It occurs in dim light or other situations with low illumination, such as twilight or in a...
Read morePhotopic vision
Photopic vision refers to seeing in bright light , when the cones in the retina are active. This is normal daytime vision and allows for sharp detail and color perception...
Read moreScotopic vision
Scotopic vision refers to the human eye's ability to see in very low light, such as near-total darkness. This is primarily due to the rods in the retina, which are...
Read morewill-o'-the-wisp
A will-o'-the -wisp (also called a will-o'-the-wisp or fairy light ) is a phenomenon where a faint, flickering light is visible in nature, often above swamps, marshy areas, or other...
Read moreSearchlight
There are several types of searchlights used for various applications, from industrial lighting to military and emergency situations . Searchlights are characterized by their ability to project intense light over...
Read moreTyndall effect
The Tyndall effect is the phenomenon whereby light is scattered by small particles in a colloidal solution or suspension . This effect was first described by the British scientist John...
Read moreMie scattering
Mie scattering is a type of light scattering that occurs when light interacts with particles approximately equal to or larger than the wavelength of the light. This contrasts with Rayleigh...
Read moreRayleigh scattering
Rayleigh scattering is a physical phenomenon in which light (or other electromagnetic radiation) is scattered by particles much smaller than the wavelength of the light itself. This effect was first...
Read moreQuartz lamp
A quartz lamp is a type of lamp that uses quartz as the material for the lamp tube or housing. Quartz lamps are often used for applications requiring high temperatures...
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