An optical device which can be easily manufactured and which is capable of guiding light to a forward widespread range without waste, and an optical system apparatus that utilizes the same. The optical device controls a light distribution of entering light from a predetermined site and emits the controlled light, and includes a reflection utilizing portion that includes a plurality of convex structures each including an incidence surface allowing the light from the predetermined site to travel therethrough, and a reflection surface reflecting the traveling light through the incidence surface in a predetermined direction, and an emit surface that emits that emits the reflected light by the reflection surface in a predetermine light distribution direction.

A wearable pedestrian safety light for improved pedestrian visibility at night includes a light housing configured to couple to an outerwear garment. A light array is coupled to the light housing and comprises a plurality of lights. A battery housing has an inner compartment and a control wire extending to the light array. A rechargeable battery pack and a microprocessor are coupled within the inner compartment and are in operational communication with the light array via the control wire. A control switch is coupled to the battery housing and is in operational communication with the rechargeable battery pack, the microprocessor, and the light array to activate and alternatively deactivate the light array.

A light bundle control member of the present invention comprises: an entry plane on which light emitted from a light emitting element becomes incident; two reflecting planes which are arranged across the entry plane in positions opposing the light emitting element, and which respectively reflect some of the light entering via the entry plane in two directions that are substantially perpendicular to the optical axis of the light emitting element and opposed to each other; and two output planes which are arranged opposing each other across the two reflecting planes, and which respectively cause the light reflected by the two reflecting planes to be externally output. Each of the two output planes has a plurality of first ridges arranged thereon, wherein, as viewed from the output plane side, a ridge line of the plurality of first ridges is substantially parallel with the optical axis of the light emitting element.

A uniform illumination lens is arranged between a light source and an illumination surface and has a light receiving surface and a light distribution surface, the light receiving surface has a first incident surface and a second incident surface; the light distribution surface has a first emergent surface and a second emergent surface which are connected with each other; all light entering from the first incident plane in the lens is totally reflected by the reflecting plane, reflected light is emitted through the first emergent plane and does not intersect with the first incident plane, and the second emergent plane receives all light entering from the second incident plane on one side of the normal. The lens provided by the invention provides uniform illumination at near and far positions of an irradiation surface.

A total reflection lens includes a first end surface with a first diameter, and a second end surface parallel to the first end surface and with a second diameter. The second diameter is greater than the first diameter, and the two end surfaces are connected via a convexly curved lateral surface. A recess adjoining the first end surface and pointing in the direction of the second end surface is located between the first end surface and the second end surface. The recess has at least two boundary surface portions, pointing in the direction of the second end surface and separate from one another, for refracting light in the direction of the lateral surface.

A light exposure apparatus emits light which activates the body of the user. The light exposure apparatus includes a blue light source which emits blue light and a red light source which emits red light. The light includes blue light and red light. Blue light has a peak wavelength in a range from 445 nm to 500 nm. Red light has a peak wavelength in a range from 600 nm to 680 nm. The intensity of the peak wavelength of blue light is the strongest in the spectrum of the light, and the intensity of the peak wavelength of red light is the second strongest in the spectrum of the light. The relative intensity of the peak wavelength of the red light with respect to the peak wavelength of the blue light is in a range from 0.1 to 0.5 inclusive.

A light bundle control member of the present invention comprises: an entry plane on which light emitted from a light emitting element becomes incident; two reflecting planes which are arranged across the entry plane in positions opposing the light emitting element, and which respectively reflect some of the light entering via the entry plane in two directions that are substantially perpendicular to the optical axis of the light emitting element and opposed to each other; and two output planes which are arranged opposing each other across the two reflecting planes, and which respectively cause the light reflected by the two reflecting planes to be externally output. Each of the two output planes has a plurality of first ridges arranged thereon, wherein, as viewed from the output plane side, a ridge line of the plurality of first ridges is substantially parallel with the optical axis of the light emitting element.

A uniform illumination lens is arranged between a light source and an illumination surface and has a light receiving surface and a light distribution surface, the light receiving surface has a first incident surface and a second incident surface; the light distribution surface has a first emergent surface and a second emergent surface which are connected with each other; all light entering from the first incident plane in the lens is totally reflected by the reflecting plane, reflected light is emitted through the first emergent plane and does not intersect with the first incident plane, and the second emergent plane receives all light entering from the second incident plane on one side of the normal. The lens provided by the invention provides uniform illumination at near and far positions of an irradiation surface.

A lens assembly for implementing a low beam may include: a first lens including an incident surface having a shape enclosing a light emitting diode (LED), and an exit surface through which light of the LED exits in a direction perpendicular to the exit surface; and a second lens disposed on the exit surface of the first lens and configured to project the light of the LED that exits from the exit surface. The light of the LED that is projected through the second lens may form a low-beam pattern.

An illumination device for synthesizing light from an object at virtually infinite distance comprises a primary light source configured to emit a primary light, a concentrator positioned downstream the primary light source and configured to reduce the divergence of the primary light, an emitting surface positioned downstream the concentrator, and an absorber made of light-absorbing material positioned upstream the emitting surface and configured to absorb light rays which cross the emitting surface in an upstream direction and which, in the absence of the absorber would not be directed toward the primary light source, wherein the primary light source, the concentrator, the emitting surface and the absorber are configured so that they produces from the primary light an output light that exits the emitting surface with a luminance profile which is spatially uniform across the emitting surface, and has a narrow peak in the polar-angle distribution around an output-light direction.