Optical image capturing module

An optical image capturing module, comprising:

• a circuit assembly, which comprises a circuit substrate, a sensor holder, and an image sensing component, wherein the circuit substrate has a plurality of circuit contacts thereon;
• the sensor holder is disposed on the circuit substrate;
• the image sensing component has a first surface and a second surface, wherein the first surface is connected to the circuit substrate;
• the second surface has a sensing surface and a plurality of image contacts;
• each of the image contacts is electrically connected to one of the circuit contacts on the circuit substrate via a plurality of signal transmission elements;
• the image sensing component and the signal transmission elements are surrounded by the sensor holder;
• and
• a lens assembly, which comprises a fixed base, a movable base, and a lens group, wherein the fixed base is made of an opaque material and has a focusing hole penetrating through two ends of the fixed base, so that the fixed base is hollow;
• in addition, the fixed base is disposed on the sensor holder;
• the movable base is disposed in the fixed base, and is located in the focusing hole to be located above the image sensing component, and is controllable to move relative to the fixed base in the focusing hole in a central axial direction of the focusing hole;
• the movable base has a receiving hole penetrating through two ends of the movable base, so that the movable base is hollow;
• the lens group comprises at least two lenses having refractive power, and is disposed on the movable base and is located in the receiving hole;
• moreover, an image plane of the lens group is adjustable to be located on the sensing surface along with a movement of the movable base, and an optical axis of the lens group overlaps with a central normal of the sensing surface, so that a light passes through the lens group in the receiving hole and projects onto the sensing surface;
• wherein the optical image capturing module satisfies:
• 1.0≤f/HEP≤10.0;
• 0 deg<HAF≤150 deg;
• 0 mm<PhiD≤18 mm;
• MTFQ0≥0.2;
• MTFQ3≥0.01;
• MTFQ7≥0.01;
• 0<PhiA/PhiD≤0.99;
• and
• 0.9≤2(ARE/HEP)≤2.0;
• where f is a focal length of the lens group;
• HEP is an entrance pupil diameter of the lens group;
• HAF is a half of a maximum field angle of the lens group;
• PhiD is a maximum value of a minimum length on a periphery of the fixed base perpendicular to the optical axis of the lens group;
• PhiA is a maximum effective diameter of an image-side surface of the at least two lenses of the lens group closest to the image plane;
• ARE is a profile curve length measured from a start point where the optical axis of the lens group passes through any surface of one of the at least two lenses, along a surface profile of the corresponding lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis;
• HOI is a maximum height for image formation perpendicular to the optical axis on the image plane;
• MTFQ0, MTFQ3, and MTFQ7 are respectively a value of modulation transfer function of visible light in a spatial frequency of 110 cycles/mm at the optical axis, 0.3 HOI, and 0.7 HOI on an image plane for visible light.