Temperature-adjustable optical imaging lens

A temperature-adjustable optical imaging lens, comprising:

• an imaging lens assembly, comprising at least five lenses with refractive power and an image plane, wherein the at least five lenses, in order along an optical axis from an object side to an image side, comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens;
• a positioning assembly, comprising a lens barrel which is hollow and non-transparent, wherein the lens barrel has a cylindrical portion inside the lens barrel;
• the cylindrical portion is adapted to accommodate the imaging lens assembly;
• a thermoconductive module, disposed in the cylindrical portion of the positioning assembly, wherein the thermoconductive module is disposed between the first lens and the second lens and is in contact with the second lens, and
• a heating module, disposed on the thermoconductive module and being in contact with the first lens, wherein the heating module is adapted to provide a heat source to the first lens and the second lens;
• wherein the imaging lens assembly satisfies:
• 1.2
• ≤
• f
• /
• HEP
• <
• ¯
• 3.
• ;
• 1.5
• ≤
• HOS
• /
• f
• ≤
• 10
• ;
• 50
• ⁢
• deg
• <
• HA
• ⁢
• F
• ≤
• 1
• ⁢
• 0
• ⁢
• 0
• ⁢
• deg
• ;
• and
• 0.1
• ≤
• 2
• ⁢
• (
• ARE
• /
• HEP
• )
• ≤
• 2.
• ;
• wherein f is a focal length of the imaging lens assembly;
• HEP is an entrance pupil diameter of the imaging lens assembly;
• HAF is a half of a maximum field angle of the imaging lens assembly;
• HOS is a distance between an object-side surface, which faces the object side, of the first lens and the image plane on the optical axis;
• for any surface of any lens, ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis, and
• wherein the thermoconductive module is a washer made of heat-conductive material;
• the washer has an upper peripheral surface facing the first lens and a lower peripheral surface facing the second lens;
• the washer has an inner annular hole penetrating through the upper peripheral surface and the lower peripheral surface;
• two sides of the inner annular hole form an upper rim located on an inner side of the upper peripheral surface and a lower rim located on an inner side of the lower peripheral surface, respectively;
• the washer is disposed on the second lens;
• the second lens abuts against the lower rim;
• the heating module is disposed on the upper peripheral surface of the washer;
• the first lens abuts against the heating module, so that the heating module is in contact with the first lens and the washer.

A temperature-adjustable optical imaging lens, comprising:

• an imaging lens assembly, comprising at least five lenses with refractive power and an image plane, wherein the at least five lenses, in order along an optical axis from an object side to an image side, comprises a first lens, a second lens, a third lens, a fourth lens, and a fifth lens;
• a positioning assembly, comprising a lens barrel which is hollow and non-transparent, wherein the lens barrel has a cylindrical portion inside the lens barrel;
• the cylindrical portion is adapted to accommodate the imaging lens assembly;
• a thermoconductive module, disposed in the cylindrical portion of the positioning assembly, wherein the thermoconductive module is disposed between the first lens and the second lens and is in contact with the second lens, and
• a heating module, connected to the thermoconductive module and adapted to provide a heat source to the first lens and the second lens;
• wherein the imaging lens assembly satisfies:
• 1.6
• ≤
• f
• /
• HEP
• ≤
• 2.31
• ;
• 1.
• 7
• ≤
• HOS
• /
• f
• ≤
• 8.
• ;
• 60
• ⁢
• deg
• <
• HA
• ⁢
• F
• ≤
• 7
• ⁢
• 0
• ⁢
• deg
• ;
• and
• 0.1
• ≤
• 2
• ⁢
• (
• ARE
• /
• HEP
• )
• ≤
• 2.
• ;
• wherein f is a focal length of the imaging lens assembly;
• HEP is an entrance pupil diameter of the imaging lens assembly;
• HAF is a half of a maximum field angle of the imaging lens assembly;
• HOS is a distance between an object-side surface, which faces the object side, of the first lens and the image plane on the optical axis;
• for any surface of any lens, ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.