Converter lens attachment with built-in light source for compact digital camera
A converter lens attachment with a built-in light source for macrophotography by a compact camera is disclosed. The converter lens attachment includes a mounting seat, a printed circuit board (PCB) with light emitting diodes (LEDs) parallelly mounted on the mounting seat, an adapter ring accommodating the mounting seat and the PCB, a light diffuser connecting with the PCB, a sleeve being passed through by the light diffuser and leaning against the adapter ring, and a barrel connecting with the sleeve and accommodating the light diffuser. The adapter ring is removably connected to a base body mounted on the camera. There is a battery in the base body for supplying power to the LEDs.
1. A converter lens attached to an object side of a non-interchangeable lens of a compact digital camera, comprising:
a mounting seat being a disk with a hollow portion and having a plurality of holes thereon;
a lens embedded in the hollow portion of the mounting seat;
a printed circuit board (PCB) with a centered hollow corresponding to the lens, parallelly mounted on the mounting seat, having a plurality of light emitting diodes (LEDs) on one side of the PCB, and having a plurality of conductive pins on an another side of the PCB, wherein the conductive pins pass through the holes of the mounting seat;
an adapter ring accommodating the mounting seat and the PCB;
a light diffuser made of translucent plastic, composed of a hollow cone and a mounting ring at a small end thereof, a gap being remained between the mounting ring and the small end of the hollow cone, and the mounting ring being accommodated in the adapter ring to connect with the PCB, wherein the LEDs face the gap for emitting light through the hollow cone;
a sleeve having a surrounding flange for leaning against the adapter ring, and passed through by the hollow cone, wherein the mounting seat, the PCB, the light diffuser and the sleeve are fixed together by one or more fastening elements;
a barrel axially connected to the sleeve for entirely accommodating the hollow cone; and
a base body removably connecting with the adapter ring, having a plurality of cavities for being inserted by the conductive pins, having a battery therein for supplying power to the PCB through the conductive pins, and having a switch thereon for switching on/off power from the battery to the PCB;
thereby the base body is removably mounted on the camera.
2. The converter lens as in claim 1 , wherein mounting seat has a tube at a center thereof, and the lens is surrounded by the tube.
3. The converter lens as in claim 2 , wherein the PCB is mounted on the mounting seat by inserting the tube into the centered hollow of the PCB.
4. The converter lens as in claim 3 , further comprising an O-ring, whose outer diameter is larger than inner diameter of the centered hollow of the PCB, is put around the tube to press upon the PCB.
5. The converter lens as in claim 1 , wherein the adapter ring has a first inner thread and a smooth surface on inner side thereof, the smooth surface is higher than the first inner thread to form a step being leaned against by the PCB.
6. The lens converter as in claim 1 , wherein the sleeve has a second inner thread at an outward end thereof, and the barrel has a first outer thread for screwedly connecting the second inner thread.
7. The lens converter as in claim 1 , wherein the base body has a hollow protrusion for connecting with the adapter ring.
8. The lens converter as in claim 5 , wherein the base body has a hollow protrusion with a second outer thread for connecting with the first inner thread of the adapter ring.