Method for drilling holes on insulators, fabricating optical windows and adjusting angle of optical window circumferential surface and apparatus for drilling holes on insulators and image detection device module

A method for fabricating an optical window made from an insulator that is located on an incident side of an optical element, comprising the steps of:

• ejecting a solution capable of dissolving the insulator formed in a plank shape to construct the optical window through a nozzle, the solution containing particles formed at a size between 20 μm and 400 μm;
• hitting a drilling spot of a targeted object with the ejecting solution at a pressure between 5×10−2 N/cm2 and 20×10−2 N/cm2;
• and
• forming a hole on the drilling spot of the targeted object by continuously hitting with the particulate solution to become a window opening.

A method for adjusting an angle of an optical window circumferential surface of an optical window made from an insulator and located on an incident side of an optical element, the circumferential surface forming an included angle with an optical axis to become an intended angle, the optical window having an opening on the incident side that is greater than another opening formed on an emission side of the optical window, the method comprising the steps of:

• forming a protection layer on a surface of a targeted object on which the optical window is formed;
• forming an opening for hole drilling on the protection layer to perform hole drilling;
• and
• drilling a hole by dissolving the insulator through a solution to pass through the opening to reach the targeted object;
• wherein the protection layer prevents the solution from being in contact with the surface of the insulator;
• the opening formed at the step of forming an opening for hole drilling being smaller than the opening on the incident side;
• the solution at the step of drilling a hole forming particles at diameters between 20 μm and 400 μm that are smaller than the opening for hole drilling and being ejected through a nozzle at a pressure between 5×10−2 N/cm2 and 20×10−2 N/cm2 to continuously hit a drilling spot on the targeted object until the targeted objected is run through, the angle of the circumferential surface of the optical window being adjustable by altering the hitting pressure and ingredient concentration of the solution at the step of drilling a hole.

An apparatus for drilling holes on insulators to form a micro-hole on a targeted object made from an insulator, comprising:

• a nozzle to eject a solution to form particles at diameters between 20 μm and 400 μm to dissolve the insulator;
• a solution supply system to deliver the solution to the nozzle;
• and
• a targeted object holding mechanism to hold the targeted object at a drilling spot to allow the targeted object to continuously receive the ejecting solution at a hitting pressure between 5×10−2 N/cm2 and 20×10−2 N/cm2.