This optical system (OL) comprises a front group (GA), an aperture stop (S), and a rear group (GB) that are arranged in order from the object side along an optical axis. The rear group (GB) has a focusing lens group (GF1) disposed closest to the object side in the rear group (GB) and having negative refractive power, during focusing, the focusing lens group moves along the optical axis, and the spacing between adjacent lens groups changes, and the following conditional expression is satisfied. 0.50<ST/TL<0.95, where ST is the distance on the optical axis from the aperture stop (S) to an image surface (I), and TL is the total length of the optical system (OL).

An endoscope apparatus has an endoscope and a video processor. The endoscope has a magnet and a coil, the magnet has a voice coil motor configured to be movable with respect to the coil and a Hall device disposed in the vicinity of the coil and configured to detect a magnetic field of the magnet in order to detect a position of the magnet. The video processor includes a position detection circuit configured to detect the position of the magnet from an outputted signal of the Hall device, an arithmetic operation section configured to correct a sensor output signal indicating the position of the magnet detected by the position detection circuit using correction information and output the sensor output signal, and a drive control circuit configured to control a current or a voltage to the coil based on an arithmetic operation result of the arithmetic operation section.

An endoscope apparatus has an endoscope and a video processor. The endoscope has a magnet and a coil, the magnet has a voice coil motor configured to be movable with respect to the coil and a Hall device disposed in the vicinity of the coil and configured to detect a magnetic field of the magnet in order to detect a position of the magnet. The video processor includes a position detection circuit configured to detect the position of the magnet from an outputted signal of the Hall device, an arithmetic operation section configured to correct a sensor output signal indicating the position of the magnet detected by the position detection circuit using correction information and output the sensor output signal, and a drive control circuit configured to control a current or a voltage to the coil based on an arithmetic operation result of the arithmetic operation section.

The invention relates to a long-range optical device comprising at least one sight channel and an image capturing channel with a camera module, wherein the sight channel and the image capturing channel are coupled to one another by means of an adjusting mechanism such that a first image detail observed in the sight channel essentially corresponds to a second image detail captured by the camera module; an interface module for establishing a connection with an electronic terminal; a processing unit; a memory unit, and a support unit, in which support unit the sight channel is arranged, wherein a heat dissipation device is formed between the support unit and the processing unit and/or between the support unit and a housing of the sight channel and/or on the camera module. The invention moreover relates to an observation and image capturing system.

According to certain embodiments, an electronic device comprises a housing; and a camera module disposed in an inner space of the housing and including: a barrel having an opening; and a plurality of lenses with aligned centers with an image sensor in an inner space of the barrel, wherein the plurality of lenses comprises at least one other lens and a first lens disposed closest to the opening and having a first outer diameter, wherein the first lens includes: a lens portion, forming an effective area of the first lens, the lens portion exposed to the opening; a connecting portion, forming a portion of an ineffective area of the first lens, extended from the lens portion and inclined at an angle in a first direction away from the lens portion; and a flange portion, forming another portion of the ineffective area of the lens portion, extended from the connecting portion in a second direction substantially perpendicular to a stack direction of the plurality of lenses, wherein the barrel includes: a head portion containing the opening and having a second outer diameter; a body portion extended from the head portion, accommodating the at least one other lens of the plurality of lenses, and having a third outer diameter greater than the second outer diameter; and an engaging portion formed in the inner space of the barrel and engaged with the flange portion, and wherein the first outer diameter of the first lens is greater than the second outer diameter of the head portion.

According to certain embodiments, an electronic device comprises a housing; and a camera module disposed in an inner space of the housing and including: a barrel having an opening; and a plurality of lenses with aligned centers with an image sensor in an inner space of the barrel, wherein the plurality of lenses comprises at least one other lens and a first lens disposed closest to the opening and having a first outer diameter, wherein the first lens includes: a lens portion, forming an effective area of the first lens, the lens portion exposed to the opening; a connecting portion, forming a portion of an ineffective area of the first lens, extended from the lens portion and inclined at an angle in a first direction away from the lens portion; and a flange portion, forming another portion of the ineffective area of the lens portion, extended from the connecting portion in a second direction substantially perpendicular to a stack direction of the plurality of lenses, wherein the barrel includes: a head portion containing the opening and having a second outer diameter; a body portion extended from the head portion, accommodating the at least one other lens of the plurality of lenses, and having a third outer diameter greater than the second outer diameter; and an engaging portion formed in the inner space of the barrel and engaged with the flange portion, and wherein the first outer diameter of the first lens is greater than the second outer diameter of the head portion.

A driving mechanism is provided, including a fixed portion, a movable portion, a driving assembly and a connecting element. The movable portion may move relative to the fixed portion and is used for holding an optical module. The driving assembly moves the movable portion relative to the fixed portion. The connecting element is movably connected to the fixed portion and the movable portion.

A position detection device detects a position of a lens holder in an X-axis direction based on a change in an output value of a first magnetic sensor, a position of the lens holder in a Y-axis direction based on a change in an output value of a second magnetic sensor, and a position of the lens holder in a Z-axis direction based on the changes in the output values of the first magnetic sensor and the second magnetic sensor.

A photosensitive module is provided, for receiving light passing through a lens in an electronic device, including a base assembly, a first transparent plate, an image sensor, and a first plastic member. The base assembly includes a substrate having a main body that includes a metal material. The first transparent plate is located on the first side of the base assembly. The image sensor is located on the second side of the base assembly and adjacent to the main body, wherein the first side is opposite the second side. The substrate is disposed between the image sensor and the first transparent plate. The first plastic member is connected to the base assembly. The image sensor is surrounded by the first plastic member. When the photosensitive module receives light, the light passes through the first transparent plate and an opening of the main body sequentially to the image sensor.

A photosensitive module is provided, for receiving light passing through a lens in an electronic device, including a base assembly, a first transparent plate, an image sensor, and a first plastic member. The base assembly includes a substrate having a main body that includes a metal material. The first transparent plate is located on the first side of the base assembly. The image sensor is located on the second side of the base assembly and adjacent to the main body, wherein the first side is opposite the second side. The substrate is disposed between the image sensor and the first transparent plate. The first plastic member is connected to the base assembly. The image sensor is surrounded by the first plastic member. When the photosensitive module receives light, the light passes through the first transparent plate and an opening of the main body sequentially to the image sensor.