Abstract: A multilayer optical film includes a plurality of optical repeat units where each of the optical repeat units includes at least individual first and second layers. The first and second layers in each of the optical repeat units have respective indices of refraction n1 and n2 and corresponding respective f-ratios f1 and f2 along a same in-plane first direction for a same first visible wavelength in a visible wavelength range extending from about 420 nm to about 680 nm, where n1>n2, and one of f1 and f2 is between about 0.55 and about 0.80. For illuminant D65 light incident on the multilayer optical film, the multilayer optical film reflects and transmits the incident light with the reflected and transmitted lights having color shifts below specified limits in a CIE L*a*b* color space. A glass laminate includes the multilayer optical film disposed between glass layers.

Abstract: A multilayer optical film includes a plurality of alternating polymeric first and second layers and optically absorptive material dispersed in at least one layer of the multilayer optical film. The multilayer optical film has an average optical transmittance in a visible wavelength range extending from about 450 nm to about 650 nm of about 0.5% to about 40%, an average optical reflectance in the visible wavelength range of less than about 40%, and an average optical reflectance in an infrared wavelength range extending from about 850 nm to about 1200 nm of greater than about 60%. For illuminant D65 light incident on the multilayer optical film, the multilayer optical film reflects and transmits portions of the incident light as reflected and transmitted lights that have color shifts below specified limits in a CIE L*a*b* color space. A glass laminate includes the multilayer optical film disposed between glass layers.

Abstract: An optical device for sensing a presence of an analyte in a person is provided. The optical device includes a light source, an optical stack, and a reader. The light source emits a first light having a first wavelength. The optical stack is placed on a skin of the person. The optical stack includes a sensor material and an optical filter. The sensor material emits a second light having a second wavelength when irradiated with the first light. An optical property of the second light is sensitive to the presence of the analyte. The optical filter is disposed on the sensor material and includes a plurality of microlayers numbering at least 10 in total. The optical filter has different first and second transmittances at the respective first and second wavelengths.

Abstract: A reusable tie-all or bundle fastener, which comprises a single strap, made of plastic material with a socket having a passageway therethrough at one end of the tie, and a tongue with ratchet teeth on the other end adapted to slip through the passageway in the socket. There is a locking pawl in the socket which is pivoted to the socket and which has a lever so that it can be raised to release the pawl from between the strap teeth when a loop is formed from the tie-all so as to release the tie. Two or more ties can be used in combination to form an enlarged loop.

Abstract: A new type of watersports equipment that allows sports participants the opportunity to engage in their particular watersport at night. The sports participant wears a headpiece made of rubber, plastic or some other suitable material to which may be affixed any number of suitably sized waterproof lights. The lights can either be attached directly and permanently to the headpiece or can be housed in an enclosure with the lens or lenses showing through.The headpiece can be firmly attached to the wearer's head by different combinations of straps and fasteners. If necessary the invention can have an auxiliary power source carried by the wearer. The nighttime watersports illuminator can be used in a number of different watersports. It can increase the duration of the wearer's available time of participation in his or her particular sport by allowing the activity to be conducted after dark.