Abstract: A double lens-barrel device includes a first lens barrel, a second lens barrel, an intermediate connecting portion and a distance detecting element. The intermediate connecting portion is disposed between the first lens barrel and the second lens barrel. The first lens barrel is fixed to the intermediate connecting portion. The second lens barrel is movable with respect to the intermediate connecting portion for changing the distance between the first lens barrel and the second lens barrel. The distance detecting element is only disposed between the second barrel portion and the intermediate connecting portion to detect a change of distance between a first optical axis of the first lens barrel and a second optical axis of the second lens barrel. The first optical axis and the second optical axis are perpendicularly connected to a reference line.

Abstract: A ranging telescope includes an object lens unit, an image turning module, an eyepiece unit and a display. Ambient light passes through the object lens unit, the image turning module and the eyepiece unit to form an ambient light path. The display is configured to generate display light which passes through the image turning module and then through the eyepiece unit. The light flux regulator is disposed in the ambient light path and between the object lens unit and the eyepiece unit, for regulating flux of the ambient light or the display light that passes through the eyepiece unit, so as to regulate an intensity difference between the ambient light and the display light passing through the eyepiece unit.

Abstract: A lighting module includes a lighting unit, a cylindrical optical element, a supporting unit, and a base. The supporting unit connects the base and a part of the supporting unit is higher than a junction of the base and the supporting unit. The lighting unit is disposed on the base and includes a lighting surface emitting a light beam. The cylindrical optical element includes an incident surface and both ends of the cylindrical optical element are respectively connected to the supporting unit making the incident surface facing the lighting surface and having an interval from the lighting unit to the incident surface, and the light beam enters the cylindrical optical element from the incident surface. The lighting module satisfies the following condition: 2?D/E?6; wherein D is a diameter of the cylindrical optical element and E is the interval from the lighting unit to the incident surface.

Abstract: A novel structured for a diode-like PID protection (DLPP) device structure and process are described. An N-well, three associate N+ regions and a P+ region are formed on a P substrate. The DLPP is structured as a butting diode with a polysilicon gate above the butting region. The gate is connected to a metal antenna element and to the zener like trigger element of the device. The N-well functions as a resistor and capacitor buffer between the poly gate and antenna and the substrate. The antenna picks up a portion of the plasma charge to provide a gate voltage. There is an inversion layer or accumulation layer for positive or negative plasma charge formed under the poly gate. The junction of the effective zener diode is found in the interface between the N-type inversion layer and P+, or N+ and P-type accumulation layer. Changing the shape and the size of the antenna changes the gate voltage, and subsequently the trigger voltage of the DLPP.