Abstract: Waveguides comprising materials with refractive index greater than or equal to 1.8 and methods of patterning waveguides are disclosed. Patterned waveguides comprising materials with refractive index greater than or equal to 1.8 can be incorporated in display devices, such as, for example wearable display devices to project virtual images to a viewer. A waveguide may be transparent and may comprise a substrate comprising a first material having a first refractive index greater than about 2.0. Diffractive features may be formed, on the substrate, of a second material having a second refractive index that is lower than the first refractive index. A third material may be disposed over the diffractive features and may have a third refractive index that is higher than the second refractive index.

Abstract: A photography supporting frame comprises a base seat and supporting legs sequentially arranged around the base seat. Connecting bosses are arranged around the base seat; clamping teeth are sequentially arranged on the peripheries of the connecting bosses. The supporting legs each comprise a locating hook, a ball, a spring, an insertion piece, a foot shaft sleeve and a supporting leg rod. The ball and the spring are sequentially arranged in a cavity of the insertion piece from up to down; the locating hook is arranged in the middle of the upper portion of the insertion piece and connected to the ball. The insertion piece is arranged in the foot shaft sleeve. One end of the foot shaft sleeve is connected to one of the connecting bosses, and the other end of the foot shaft sleeve is arranged on the supporting leg rod.

Abstract: A photography supporting frame comprises a base seat and supporting legs sequentially arranged around the base seat. Connecting bosses are arranged around the base seat; clamping teeth are sequentially arranged on the peripheries of the connecting bosses. The supporting legs each comprise a locating hook, a ball, a spring, an insertion piece, a foot shaft sleeve and a supporting leg rod. The ball and the spring are sequentially arranged in a cavity of the insertion piece from up to down; the locating hook is arranged in the middle of the upper portion of the insertion piece and connected to the ball. The insertion piece is arranged in the foot shaft sleeve. One end of the foot shaft sleeve is connected to one of the connecting bosses, and the other end of the foot shaft sleeve is arranged on the supporting leg rod.

Abstract: A tripod head panel device of a tripod head comprises a tripod head panel and a removably mounted snap-fit plate. The tripod head panel comprises a fixed plate, a moveable plate mounted underneath the fixed plate, and a driving plate mounted underneath the moveable plate. The fixed plate comprises a supporting base plate and a first retaining wall protruding upward from the supporting base plate. The moveable plate comprises a supporting base plate and a second retaining wall protruding upward from the supporting base plate, with a driving hole provided in the center of the moveable plate. The driving plate comprises a base mounted underneath the moveable plate and a handle extending from an end of the base, with an offset cam inside the driving hole formed on the seat. The snap-fit plate is mounted on the supporting base plate between the first and the second retaining walls.

Abstract: A tripod head panel device of a tripod head comprises a tripod head panel and a removably mounted snap-fit plate. The tripod head panel comprises a fixed plate, a moveable plate mounted underneath the fixed plate, and a driving plate mounted underneath the moveable plate. The fixed plate comprises a supporting base plate and a first retaining wall protruding upward from the supporting base plate. The moveable plate comprises a supporting base plate and a second retaining wall protruding upward from the supporting base plate, with a driving hole provided in the center of the moveable plate. The driving plate comprises a base mounted underneath the moveable plate and a handle extending from an end of the base, with an offset cam inside the driving hole formed on the seat. The snap-fit plate is mounted on the supporting base plate between the first and the second retaining walls.