Scanning module
A scanning module includes a body, a reflecting unit, and an image capture unit. The body includes a reflecting chamber disposed in a surrounding wall. The surrounding wall is formed with an incident hole allowing an incident light field to be transmitted into the reflecting chamber therethrough along an incident axis. The reflecting unit is disposed within the reflecting chamber, and includes a first reflector for reflecting the incident light field, as well as second and third reflectors for reflecting light transmitted from the first reflector to the image capture unit. An angle formed between the incident axis and a normal line of the first reflector is not smaller than 30 degrees. The image capture unit is disposed nearer to the incident hole than the first reflector along a direction of the incident axis, and includes a lens, and a sensing member.
1 . A scanning module comprising:
a body including a surrounding wall and a reflecting chamber disposed in said surrounding wall, said surrounding wall being formed with an incident hole adapted to allow an incident light field to transmit into said reflecting chamber through said incident hole along an incident axis;
a reflecting unit disposed within said reflecting chamber in said body and including a first reflector for reflecting said incident light field, a second reflector for reflecting light transmitted from said first reflector, and a third reflector for reflecting light transmitted from said second reflector, an angle formed between said incident axis and a normal line of said first reflector being not smaller than 30 degrees; and
an image capture unit being disposed nearer to said incident hole than said first reflector along a direction of said incident axis, said image capture unit including a lens permitting light transmitted from said third reflector to pass therethrough, and a sensing member for converting the light passing through said lens into a corresponding electric signal.
2 . The scanning module as claimed in claim 1 , wherein a distance traveled by said incident light field from said incident hole in said surrounding wall to said first reflector of said reflecting unit along said incident axis is not smaller than 20 mm.
3 . The scanning module as claimed in claim 2 , wherein said incident hole in said surrounding wall of said body has a width that is not smaller than 5 mm.
4 . The scanning module as claimed in claim 1 , wherein an angle formed between said normal line of said first reflector and said incident axis is 45 degrees.
5 . The scanning module as claimed in claim 4 , wherein said second and third reflectors of said reflecting unit are disposed parallel to each other.
6 . The scanning module as claimed in claim 1 , wherein said image capture unit is disposed in said reflecting chamber in said body.