An optical filter includes a first layer including a first notch filter arranged to attenuate electromagnetic radiation having a first wavelength λ.sub.1 incident normally thereupon. The optical filter includes a second layer including a second notch filter arranged to attenuate electromagnetic radiation having a second wavelength λ.sub.2 incident normally thereupon. The first wavelength λ.sub.1 and the second wavelength λ.sub.2 are different. The second layer is stacked upon the first layer. In use, the first notch filter attenuates the electromagnetic radiation having a predetermined wavelength λ incident thereupon at a first angle of incidence θ.sub.1 and the second notch filter attenuates the electromagnetic radiation having the predetermined wavelength λ incident thereupon at a second angle of incidence θ.sub.2, wherein the first angle of incidence θ.sub.1 and the second angle of incidence θ.sub.2 are different.

A visor for a helmet is disclosed. The visor includes a first lens member, which includes a first transparent shield configured with a photochromic layer. The photochromic layer is configured to adjust a first transmission state of a first viewing area of the first lens member based on the transmission of ambient light through the first viewing area. The visor also includes a second lens member that includes an electrochromic layer. The electrochromic layer is configured to adjust the transmission of ambient light through a second viewing area upon an application of a voltage to the electrochromic layer. The visor also includes a controller configured to adjust a voltage applied to the electrochromic layer, and an attachment element coupled to the first lens member configured to attach to a headgear.

This disclosure provides a method for making a helmet comprising a cavity between the outer shell and energy management layers.

A helmet contains a convex, hard outer shell, a concave, impact-dissipating inner layer, a shield, and a shield cover. The concave, impact-dissipating inner layer is fitted to the convex, hard outer shell and contains a front portion having a shield indentation, a back portion, a top portion a right side portion, and a left side portion. The left side portion is opposite the right side portion. The shield is pivotably attached to the helmet via a fulcrum and pivots about the fulcrum. The shield also partially occludes the shield indentation. The shield cover is fixably attached to the helmet and at least partially occludes the front portion. The shield cover also at least partially occludes the shield.

An electronic motorcycle helmet. The electronic motorcycle helmet includes a helmet having an aperture therein that can receive a head therethrough. A visor is disposed on a front side of the helmet and a display is disposed on an interior surface of the visor. A microprocessor, including a logic that receives a command input directed to one of a plurality of subsystems, toggles the subsystem between an activated state and a deactivated state, and displays a status window on the display corresponding to the subsystem. The plurality of subsystems includes a plurality of cameras disposed about the helmet, wherein each of the cameras is operably connected to the display and can apply a low-light filter for low-light conditions. Other subsystems include a wireless transmitter to wirelessly communicate with an external device, a GPS system, and a battery disposed at a lower edge of the rear side.

A helmet has a helmet shell and a visor pivotally connected to the helmet shell. First and second helmet electrical contacts are attached at both sides of the helmet and are adapted for electrically connecting to an electrical power source. First and second visor electrical contacts are attached to each side of the visor. The first and second visor electrical contacts are in contact with the first and second helmet electrical contacts respectively, at at least one position of the pivoting visor. First and second electrical wires are electrically connected to the first and second visor electrical contacts respectively.

The invention relates to an optical filter comprising: at least one optically transparent liquid-crystal shutter, the shutter having a polarization voltage ULCD that marks a threshold between two polarization states, and being designed to switch between at least two opacities OP1 and OP2, OP2 being strictly higher than OP1, when it receives a voltage that is above or below, respectively, the polarization voltage ULCD; and an electronic system comprising: an electronic module for controlling the liquid-crystal shutter, designed to control the voltage applied to the liquid crystal shutter; a photosensitive sensor, designed to deliver, to the electronic control module, a continuous voltage Ucs that varies depending on the luminous intensity that it receives, the photosensitive sensor being the only power supply of the electronic control module and the liquid-crystal shutter, the optical filter being characterized in that, if the photosensitive sensor receives a luminous intensity below a dazzle threshold le, the liquid-crystal shutter has an opacity OP1, and in that the electronic control module is designed, when the photosensitive sensor receives a luminous intensity above the dazzle threshold le, to deliver, to the liquid-crystal shutter, a continuous voltage Ue that is strictly above the polarization voltage ULCD of the shutter, so that the latter switches from opacity OP1 to opacity OP2.

Protecting helmet of the type provided with at least one inner shell for shock absorption and at least one outer rigid shell that define a front opening for the face of a user, as well as a protective visor at least rotatable between a lowered position intercepting, at least partially, the front opening and a raised position disengaged from said front opening, and a raising/lowering mechanism to raise/lower the protective visor, wherein the raising/lowering mechanism comprises: at least one base member integral with, or made in a single piece with, or coincident with, part of the outer shell, and arranged in a side position with respect to said front opening; a lever body mounted on said outer shell or said base member so as to rotate around a first axis and provided with a support swinging with respect to said first axis between a proximal position and a distal position with respect to said front opening, said support further comprising hooking means to hook with a corresponding side area of the protective visor; elastic return-means constrained to said outer shell or said base member, and acting on said lever body to push it towards its distal position; one or more hooking teeth integral with said side area of the protective visor and shaped for the engagement with said hooking means of the lever body; at least one guide cam and a respective follower projection engaged with said guide cam, said at least one guide cam being integral with said at least one base member, and said respective follower projection being constrained so that to integrally rotate with said first side area of the protective visor, or vice versa.

Advantageously, the support of the lever body comprises at least one multiple-seat profile and the raising/lowering mechanism further comprises an intermediate disc-shaped element coupled with the afore said support of the lever body so that to rotate with respect to such support around a second axis, and also to swing with respect to the above mentioned first axis integrally with the support of the lever body. The intermediate disc-shaped element further comprises constraining means for the removable constraint to at least one of said hooking teeth of the protective visor in order to transmit at least the circular motion of the protective visor, during the raising or lowering thereof, to the same intermediate disc-shaped element, as well as engaging means, at least integrally rotatable with the same intermediate disc-shaped element, for the movable snap fitting with the afore mentioned at least one multiple-seat profile of the support of the lever body.

A helmet has a helmet shell and a visor pivotally connected to the helmet shell. The helmet further has an electrical device attached to the visor. First and second helmet electrical contacts are attached at both sides of the helmet and are adapted for electrically connecting to an electrical power source. First and second visor electrical contacts are attached to each side of the visor and are electrically connected to the electrical device. The first and second visor electrical contacts are pivotally connected to the helmet shell about first and second pivot axes passing through the first and second helmet electrical contacts respectively. The first and second visor electrical contacts are in contact with the first and second helmet electrical contacts respectively, at all positions of the pivoting visor.

Provided are a smart window, a sliding smart window, a smart window for a vehicle, a sun visor for a vehicle, a smart window device, and a head-mounted smart window device which have maximized user convenience.