A method for optogenetics experiments, based on wavefront shaping and including: calculating the transmission matrix between an input end and an output end of the multimode fiber under a fixed shape; implanting the output end into an intracranial space of an experimental subject; and performing wavefront compensation to a light to be input into the input end, according to the spatial position of the optical stimulation and the transmission matrix of the multimode fiber, to form a compensated expanded light, and inputting the compensated expanded light from the input end into the multimode fiber, such that the compensated expanded light, after being transmitted by the multimode fiber to the output end and output from the output end, is capable of focusing at the spatial position of the optical stimulation.

A light-emitting device (100) is disclosed. The light-emitting device (100) comprises a plurality of light-emitting elements (135) or light sources and a power module (120) adapted to selectively convey, supply or provide electrical power to the light-emitting elements (135). The power module (120) may be dimensioned such as to be able to power only a proper subset of the light-emitting elements (135) of the light-emitting device (100) at a given time, the subset having a maximum number of light-emitting elements (135) included therein with respect to the number of light-emitting elements (135) included in the all subsets of the light-emitting elements (135) of the light-emitting device (100). The plurality of sets of light-emitting elements (135) may be arranged so as to emit light over a light emission area, and the plurality of sets of light-emitting elements (135) may be arranged relatively to each other such that different sets of light-emitting elements (135) emit light over different portions of the light emission area.

An illumination system adapted for an eyewear that includes a light source configured to emit a first light including a power spectrum having full width at half maximum of less than 100 nm in a first range of wavelengths and a second light including a power spectrum having full width at half maximum of less than 100 nm in a second range of wavelengths, the power spectrum of the first light and the power spectrum of the second light differ from each other, and the light source is further configured to emit pulses of light with a pre-determined time function. The pre-determined time function comprises a plurality of packets, each packet of the plurality of packets being followed by a packet interval, and each packet including a pulse alternation between a pulse of the first light and a pulse of the second light.

The present disclosure is concerned with a skin treatment device having at least a first LED, at least a first controllable current source, in particular a first controllable constant current source, for driving the first LED, a control unit for controlled switching of at least the first controllable current source between a first state in which current is provided to the first LED and a second state in which no current is provided to the first LED, and at least a first current sensor that is connected or connectable with the first LED so that the first current sensor and the first LED form a current path at least in the second state of the first controllable current source.

A device includes an angiography module, a phototherapy module, a carrier including an optical filter and accommodating the angiography module and the phototherapy module, and a control unit controlling operation of the angiography module and the phototherapy module. The angiography module includes infrared LEDs emitting infrared light through the optical filter to irradiate a limb of a subject, and an infrared sensor sensing a part of the infrared light reflected off the limb to generate a result, based on which the control unit generates an angiogram. The phototherapy module emits infrared light through the optical filter to irradiate the limb for phototherapy.

Various embodiments are described herein that generally relate to a low-level laser therapy (LLLT) device to aid in at least one of the prevention and treatment of hair loss, rejuvenation of hair, and stimulation of hair regrowth for a certain percentage of users. In at least one embodiment, the device is a laser therapy helmet device, wherein a portion of the device rotates or pivots relative to the treatment surface during use. In at least some embodiments, the device may further comprise a plurality of modes of operation for delivering different amounts of energy to the treatment surface.

Photobiomodulation therapy systems provide a highly effective way to treat many common ailments to the human body. Many embodiments described herein enable two or more light therapy devices to be communicatively coupled together in various ways. In some embodiments, the light therapy system includes a first light device and a second light device arranged and configured to be communicatively coupled to the first light device. Each of the light devices may include a housing, a communication module, and a plurality of lights arranged and configured to emit at least one of red light and near infrared light.

Lighting systems, methods, and devices for protecting human circadian neuroendocrine function during night use are described. Suitable lighting conditions can be provided for a working environment while protecting the circadian neuroendocrine systems of those occupying the illuminated workplace during the night. Lighting systems, methods, and devices can provide substantive attenuation of the pathologic circadian disruption in night workers. Lighting systems, methods, and devices can attenuate the specific bands of light implicated in circadian disruption. LED lighting systems, methods, and devices can provide increased intensity at a different portion of the spectrum than conventional LEDs, providing a useable white light even when unfavorable portions of the wavelength are attenuated by a notch filter. LED lighting systems, methods, and devices can switch between a daytime configuration and a night time configuration, wherein the daytime configuration provides unfiltered light and the night time configuration provides filtered light.

A handheld light treatment device that aims to provide a wide variety of uses in personal care and household cleaning. The device contains a panel with light sources positioned behind a translucent or transparent head plate, to which is attachable an applicator disc and, optionally, applicator disc attachments with selected functionalities. The light panel shines light of different frequencies that may be useful for cleaning and sanitizing various surfaces. The applicator disc and applicator disc attachments have a substantially translucent or transparent base, allowing light from the light sources to shine through the head plate as well as applicator disc and applicator disc attachment, and the applicator disc to rotate while the light panel remains fixed. The applicator disc and applicator disc attachments may have bristles or other surface elements to facilitate cleaning or other uses, and the device may dispense an ingredient.

A medical device assembly is provided for removable insertion into a catheter with a lumen. The medical device assembly comprises an electromagnetic radiation (EMR) source for providing non-ultraviolet, therapeutic EMR having an intensity sufficient to inactivate one or more infectious agents and/or to stimulate healthy cell growth causing a healing effect, and a removable EMR conduction system at least partially insertable into and removable from the lumen of the catheter. The EMR conduction system has at least one optical element providing axial propagation of the therapeutic EMR through an insertable elongate body. The elongate body may have an exterior surface between a coupling end and a distal end tip that has at least one modified portion permitting the radial emission of therapeutic EMR from the elongate body proximate the modified portion. Such modified portion may be gradient along the exterior surface.