Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Abstract: A device for collecting light from one or more incident light beams includes a first surface extending in a first plane and a second surface spaced-apart from the first surface. The second surface extends in a second plane parallel to the first plane. At least one of the first surface and the second surface including an optical polish or forming a reflective mirror coating. An edge surface extends from the first surface to the second surface. At least a portion of the edge surface forms a reflective mirror. At least one structure is formed in the first surface. The structure extends inwardly into the device from the first surface. The structure is configured to redirect light from a light source directed at the first surface.

Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Abstract: A device for collecting light from one or more incident light beams includes a first surface extending in a first plane and a second surface spaced-apart from the first surface. The second surface extends in a second plane parallel to the first plane. At least one of the first surface and the second surface including an optical polish or forming a reflective mirror coating. An edge surface extends from the first surface to the second surface. At least a portion of the edge surface forms a reflective mirror. At least one structure is formed in the first surface. The structure extends inwardly into the device from the first surface. The structure is configured to redirect light from a light source directed at the first surface.

Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Abstract: Attenuator apparatus for controlling the intensity of radiation including an attenuator having through openings that vary in size to vary the intensity of a beam of radiation passing through the shutter, and means for moving the attenuator to selectively regulate the intensity of the beam of radiation passing through.

Abstract: An optical homogenizer unit including an elongated tube, a multisided elongated optical homogenizer having a length equal to the length of the tube and positioned within the tube, and filler material in the spaces between the longitudinal surfaces of the optical homogenizer and the inner surface of the tube.

Abstract: Sunlight simulators that have optical homogenizer units that provide adjustably positionable beams of radiation, each within a selected portion of the spectrum of wave lengths of radiation emitted from a light source, that have uniform output intensity profiles measured across the ends of the optical homogenizer units. These sunlight simulators include either liquid light guides or fiber optic light guides that conduct the beams of radiation, developed from the light source, to the optical homogenizer units. Dosage regulating means control the doses of radiation provided by the optical homogenizer units.

Abstract: Sunlight simulators that have optical homogenizer units that provide adjustably positionable beams of radiation, each within a selected portion of the spectrum of wave lengths of radiation emitted from a light source, that have uniform output intensity profiles measured across the ends of the optical homogenizer units. These sunlight simulators include either liquid light guides or fiber optic light guides that conduct the beams of radiation, developed from the light source, to the optical homogenizer units. Dosage regulating means control the doses of radiation provided by the optical homogenizer units.

Abstract: Sunlight simulators that have optical homogenizer units that provide adjustably positionable beams of radiation, each within a selected portion of the spectrum of wave lengths of radiation emitted from a light source, that have uniform output intensity profiles measured across the ends of the optical homogenizer units. These sunlight simulators include either liquid light guides or fiber optic light guides that conduct the beams of radiation, developed from the light source, to the optical homogenizer units. Dosage regulating means control the doses of radiation provided by the optical homogenizer units.

Abstract: Sunlight simulators that have optical homogenizer units that provide adjustably positionable beams of radiation, each within a selected portion of the spectrum of wave lengths of radiation emitted from a light source, that have uniform output intensity profiles measured across the ends of the optical homogenizer units. These sunlight simulators include either liquid light guides or fiber optic light guides that conduct the beams of radiation, developed from the light source, to the optical homogenizer units. Dosage regulating means control the doses of radiation provided by the optical homogenizer units.