KR102608928B1 - Folded camera module with rotating prism - Google Patents

Abstract

A camera module having an electrostatic protection function is disclosed. The camera module includes a lens unit equipped with one or more lenses; It is formed of a body having a central opening penetrating in the vertical direction, the lens unit is mounted using a peripheral surface of the central opening, and the image is placed in a lower area of the body so that light passing through the lens flows into the image sensor. An integrated housing in which a receiving space for accommodating the sensor is formed; and a printed circuit board on which the image sensor is mounted and coupled to the integrated housing so that the image sensor is accommodated in the receiving space.

Description

Folded camera module with rotating prism

The present invention relates to a folded camera module equipped with a rotating prism.

Typically, portable devices such as smartphones, tablets, laptops, etc. are equipped with one or more camera devices to capture still and/or video images. These camera devices usually have a zoom function that can enlarge the image.

Zoom can be broadly divided into digital zoom and optical zoom depending on the method. Here, digital zoom is a technology that enlarges the screen using software without moving the lens. When enlarging using digital zoom, the image quality may be damaged because the image of the actual photographed subject is enlarged.

Meanwhile, optical zoom is a technology that adjusts the focal length of a camera lens by moving the lens using an actuator. Optical zoom is a technology that changes the refraction of light to recognize the subject as a larger object, so image quality is not compromised within the acceptable resolution range.

Portable devices such as smartphones are mainly equipped with a digital zoom function because it is difficult to move the lens in the thickness direction due to their thin thickness.

However, recently, folded camera modules are being installed in portable devices to solve the limitation of the thinness of portable devices and enable the implementation of optical zoom functions.

Figure 1 shows the configuration of a general folded camera module.

Referring to FIG. 1, the folded camera module includes a prism 110, a lens unit 120 equipped with an actuator for moving the lens, and an image sensor 130.

In the folded camera module, light flowing in in the first direction (i.e., incident optical axis direction) is incident on the prism 110, is converted to the second direction (i.e., lens optical axis direction), and flows into the lens unit 120. and reaches the image sensor 130.

The lens unit 120 may include one or more lenses, and the lenses may be moved for auto focus or optical image stabilization (OIS) purposes.

In this way, the folded camera module is equipped with a direction change element such as a prism 110 to change the path of light incident perpendicularly from the subject to the portable device to be parallel to the portable device. As a result, the lens assembly can be arranged in the width direction of the portable device to ensure space for moving the lens, making it possible to perform an optical zoom function.

However, the folded camera module has a limitation in that the installation posture and movement range of the prism are limited, allowing limited shooting in only one direction of one side of the portable device.

Therefore, in order to implement an optical zoom function in both directions of a portable device, a plurality of folded camera modules must be provided to correspond to each shooting direction, which has the problem of requiring a lot of installation space.

Korean Patent Publication No. 10-2021-0035516

The present invention is equipped with a rotating prism that can significantly reduce the number of camera modules and the size of the occupied space required for a portable device by allowing one folded camera module to be shared when photographing both sides of the portable device. This is to provide a folded camera module.

The present invention provides different angles of view and aperture in selfie mode (i.e., front-facing shooting mode for shooting in the display mounting direction) and main mode (i.e., rear-facing shooting mode for shooting in the opposite direction of the display mounting direction). The purpose is to provide a folded camera module with a rotating prism that allows a value (F-number) to be applied, enabling image shooting that matches the shooting mode selected by the user.

The present invention can secure an optical path of sufficient length even in a thin portable device through a folded structure in which the optical axis changes using a prism, making relatively distant subjects clearer compared to existing digital zooms. The purpose is to provide a folded camera module equipped with a rotating prism that can take pictures.

The present invention is a camera device in which a lens unit can be constructed by assembling independently modularized lens modules, thereby improving productivity through individual manufacturing and ensuring compatibility of each lens module, and having various magnifications through various combinations of lens modules. The purpose is to provide a folded camera module with a rotating prism that enables the production of.

Other objects of the present invention may be easily understood through the following description.

According to one aspect of the present invention, a prism unit that changes the direction of light from the incident optical axis direction to the lens optical axis direction; a lens unit disposed in the direction of the lens optical axis so that light whose traveling direction is changed by the prism is incident; and an image sensor that detects light emitted from the lens unit, wherein the prism unit includes a prism that changes the direction of incoming light, and the prism has a first direction and a second direction opposite to the first direction. In order to change the direction of light flowing in from one of the two directions and make it incident on the lens unit, a folded camera module is provided with a rotating prism that is rotated 90 degrees.

The prism unit includes a prism holder for fixing the prism; And it may further include a prism base disposed to surround the outside of the prism holder and fastened to a shaft coupled to the prism holder. Here, a magnet is fixedly disposed on the prism holder, a plurality of coils are respectively fixedly disposed on the inner surface of the prism base, and the prism holder is connected to the shaft by Lorentz force due to electromagnetic interaction between the magnet and the coil. is rotated around the center of rotation, and each of the plurality of coils may be arranged to be spaced apart from each other at an inner surface of the prism base facing a magnet when the prism holder is rotated around the shaft.

In order to ensure that the Lorentz force is continuously generated until the prism holder is rotated 90 degrees, the inner surface of the prism base may be formed in a [-shape, ㄷ-shape, or C-shape.

By changing the direction of the current flowing in the coil, the prism can be rotated to receive light from a first direction or to receive light from a second direction.

Stoppers corresponding to each other may be formed on the shaft and the prism base to limit the rotation angle of the prism holder to 90 degrees.

The lens unit is formed by attaching a plurality of independently manufactured lens modules to each other in the direction of the optical axis of the lens, where the frontmost lens module is coupled with the prism unit, and the rearmost lens module is coupled with the image sensor. It can be.

One of the plurality of lens modules constituting the lens unit may be provided with a variable aperture that adjusts the amount of light.

The variable aperture may be controlled to have different aperture diameters when photographing in the first direction and in the second direction according to rotation of the prism.

A light entrance opening may be formed on each of the front and rear sides of the body of the portable device equipped with the folded camera module to correspond to the position of the prism that is rotated 90 degrees.

In order to apply different angles of view when taking pictures of the front and back directions of the portable device using the folded camera module, a relay lens may be fixedly mounted on the front light entrance.

The relay lens may be mounted at the front light entrance to replace the front cover glass.

Other aspects, features and advantages in addition to those described above will become apparent from the following drawings, claims and detailed description of the invention.

According to an embodiment of the present invention, one folded camera module is shared when photographing both sides of the portable device, thereby significantly reducing the number of camera modules required for the portable device and the size of the occupied space. .

In addition, different angles of view and aperture values can be applied in selfie mode (i.e., front-facing shooting mode that shoots in the direction of display mounting) and main mode (i.e., rear-facing shooting mode that shoots in the opposite direction of the display mounting direction). , there is also the effect of enabling video shooting that matches the shooting mode selected by the user.

In addition, the folded structure, in which the optical axis changes using a prism, allows an optical path of sufficient length to be secured even in thin portable devices, making it possible to clearly capture relatively distant subjects compared to existing digital zooms. There is also a possible effect.

In addition, the lens unit can be constructed by assembling independently modularized lens modules, improving productivity through individual manufacturing and ensuring compatibility of each lens module, and enabling camera devices with various magnifications through various combinations of lens modules. It also has the effect of making production possible.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

Figure 1 is a diagram showing the configuration of a general folded camera module.
Figure 2 is a diagram schematically illustrating a prism unit according to an embodiment of the present invention.
Figure 3 is a diagram for explaining the rotation process of a prism according to an embodiment of the present invention.
Figure 4 is a diagram for explaining the operation of a folded camera module according to prism rotation according to an embodiment of the present invention.
Figures 5 and 6 each illustrate the configuration of a folded camera module according to an embodiment of the present invention.
Figure 7 is a diagram illustrating the arrangement of an aperture according to embodiments of the present invention.
Figure 8 is a diagram for explaining the installation structure of a folded camera module in a portable device according to an embodiment of the present invention.
Figure 9 is a diagram for explaining the function of a relay lens according to an embodiment of the present invention.
Figure 10 is a diagram illustrating the arrangement of a cover glass and a relay lens for a selfie mode operation according to embodiments of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The terms used herein are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

In addition, when describing with reference to the accompanying drawings, identical or related reference numbers will be assigned to identical or related elements regardless of the drawing symbols, and overlapping descriptions thereof will be omitted. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Figure 2 is a diagram schematically illustrating a prism unit according to an embodiment of the present invention, Figure 3 is a diagram illustrating a rotation process of a prism according to an embodiment of the present invention, and Figure 4 is an illustration of an embodiment of the present invention. This is a diagram to explain the operation of a folded camera module according to prism rotation according to an embodiment. FIGS. 5 and 6 are diagrams illustrating the configuration of a folded camera module according to an embodiment of the present invention, and FIG. 7 is a diagram illustrating the arrangement of an aperture according to embodiments of the present invention. 8 is a diagram for explaining the installation structure of a folded camera module in a portable device according to an embodiment of the present invention. FIG. 9 is a diagram for explaining the function of a relay lens according to an embodiment of the present invention, and FIG. 10 is a diagram illustrating the arrangement of a cover glass and a relay lens for selfie mode operation according to embodiments of the present invention. am.

Referring to FIG. 2, the prism unit 210 of the folded camera module 500 includes a prism 110, a prism holder 211, a shaft 213, a magnet 215, a coil 217, and a prism base 219. ) may include. Although not shown, it may further include a substrate electrically connected to the coil 217.

The prism 110 has an inclined surface capable of reflecting light, so that light entering the first direction (i.e., the incident optical axis direction) through the incident surface is reflected and converted to the second direction (i.e., the lens optical axis direction), and is converted to the exit surface. is released through An inclined surface capable of reflecting light may have an inclination angle of, for example, 45 degrees.

The prism 110 is fixed by a prism holder 211, and the prism holder 211 is rotatably coupled to the prism base 219 via a shaft 213.

Here, to enable OIS Y ((optical image stabilization Y) driving of the prism holder 211 (i.e., prism 110), a prism ball, for example, is placed between the prism holder 211 and the prism base 219. A guide (not shown) may be disposed so that the prism holder 211 is tilted around the ball guide along the Y axis. For this purpose, although not shown, a magnet, coil, yoke, FPCB, etc. may be provided.

A plurality of magnets 215 may be disposed in the prism holder 211. The prism holder 211 may be made of a non-magnetic material to minimize the influence of the magnetic force of the magnet 215.

As illustrated in FIG. 3 , one or more magnets 215 may be disposed in the central area of the surface of each of the two sides of the prism holder 211 that is not coupled to the shaft 213. The magnet 215 is, for example, a flat magnet having a flat plate shape, and may be disposed on the surface of the prism holder 211 with its N and S poles exposed to the outside.

The prism base 219 is positioned to be spaced outward from the prism holder 211, and a plurality of coils 217 may be disposed on the inner surface of the prism base 219 facing the magnet 215.

The inner surface of the prism base 219 on which the plurality of coils 217 are disposed is shaped, for example, [shape, ㄷ shape, C] in order not to interfere with the rotation of the prism holder 211 on which the magnet 215 is disposed. It may be formed in any one of the following shapes.

As illustrated in FIG. 3, the plurality of coils 217a, 217b, 217c, and 217d are arranged to be spaced apart from each other, and when the prism 110 and the prism holder 211 are rotated with the shaft 213 as the center of rotation, , The magnet 215 may be disposed at a position corresponding to the rotation path along which the magnet 215 moves (i.e., a position on the inner surface of the prism base 219 where the magnet 215 faces due to the rotation of the prism holder 211).

A controller (not shown) can control current to be applied independently to each coil 217. At this time, when current is applied to two or more coils 217 at the same time, the direction of the current flowing in each coil can be controlled to match each other.

The magnet 215 and the coil 217 arranged to face each other electromagnetically interact so that the prism 110 and the prism holder 211 rotate in the first or second direction with the shaft 213 as the rotation center. It can be rotated in any direction.

As illustrated in Figures 3 and 4, the operating mode of the folded camera module 500 varies from selfie mode (i.e., front-facing shooting mode for shooting in the display mounting direction) to main mode (i.e., in the opposite direction of the display mounting direction). In order to switch to a rear-facing shooting mode for shooting, the prism 110 and the prism holder 211 may be rotated in the first rotation direction.

That is, as illustrated in Figures 3 (b) and (c), the controller supplies current to the coil 217 so that an electromagnetic field is formed around the coil 217, and the coil 217 and the magnet ( The prism 110 and the prism holder 211 may be rotated in the first rotation direction by the Lorentz force F resulting from the electromagnetic interaction of 215).

In another case, in order to switch the operation mode of the folded camera module 500 from the main mode to the selfie mode, the prism 110 and the prism holder 211 rotate in a second rotation direction opposite to the first rotation direction. It can be manipulated. For this purpose, the controller can control the current to flow in the coil 217 in the opposite direction to that when switching to the main mode, and the prism 110 is formed by electromagnetic interaction between the coil 217 and the magnet 215. and the prism holder 211 may be rotated in the second rotation direction.

In order for the folded camera module 500 to operate in selfie mode or main mode, the rotation angle of the prism holder 211 may be limited to 90 degrees, and the shaft 213 and the prism base 219 may be used to limit the rotation angle. ), stoppers (not shown) may be formed to correspond to each other.

In order to rotate the prism holder 211 so that the folded camera module 500 switches to the selfie mode or main mode, the controller controls the current in the same direction to flow simultaneously in all of the plurality of coils 217, or uses a magnet ( It is possible to control the current to flow sequentially in the same direction only to the coil 217 that faces or will face 215).

The prism base 219, which supports the prism holder 211 from the outside via the shaft 213, allows light to flow into the rotated prism 110 for operation of the selfie mode or main mode. Each of the positions corresponding to is formed to be open to the light entrance (see FIG. 5).

As illustrated in FIG. 5, in the folded camera module 500 according to this embodiment, the prism unit 210 and the lens modules 520, 530, and 540 are individually manufactured in an independent form, and are assembled together to form a lens. It may have a module assembly structure forming the unit 120 and the folded camera module 500.

In the module-assembled folded camera module 500, for example, the prism unit 210 may be implemented to enable OIS (Optical Image Stabilizer) Y operation, and the lens unit 120 may be configured to have a plurality of lens modules assembled. can be formed.

The first lens module 520 of the lens unit 120 is implemented to enable AF (Auto Focus) and OIS The module 530 and the third lens module 540 may subsequently be sequentially combined. Additionally, the lens unit 120 may be configured by further combining a fourth lens module, a fifth lens module, etc. Although not shown, the image sensor 130 may be coupled to the rear end of the lens unit 120 (see FIG. 1).

The specific details of the first lens module 520 are such that the OIS lens barrel provided in the first lens module 520 is controlled to move forward and backward in the optical axis direction or to move perpendicular to the optical axis to drive AF (Auto Focus) and OIS The structure and control technique, the forward and backward movement structure and control technique of each lens barrel for combining the second lens module 530 and the third lens module 540 to implement the optical zoom function, etc. are obvious to those skilled in the art. A detailed description of this will be omitted.

In this way, the module-assembled folded camera module 500 can be modularized for each part, and the lens provided in each lens module can be individually controlled to move along the ball guide located in the lens unit 120, By connecting these modules together, optical zoom function can be implemented.

As illustrated in FIG. 6 , one of the lens modules 520, 530, and 540 constituting the lens unit 120 may be provided with a variable aperture 610.

The diameter of the variable aperture 610 may be adjusted by control of a controller in order to adjust the amount of light flowing into the lens unit 120. For example, the controller may measure the amount of light using a sensor (not shown) that recognizes external illumination and adjust the diameter of the aperture accordingly.

Additionally, the controller may be preset to adjust the diameter of the aperture depending on whether the folded camera module 500 should be operated in selfie mode or main mode.

This is because the focal length changes differently in selfie mode, which operates at a relatively wide angle, and main mode, which operates at a relatively narrow angle, so if the diameter of the aperture remains the same, the aperture value (F-number) changes as the focal distance changes. It varies, and the controller can adjust the aperture value to an appropriate aperture value by varying the diameter of the aperture.

For example, if the field of view (FOV) is 88 degrees and the aperture value is 1.8 in selfie mode, the controller adjusts the aperture diameter to 1.69 (=3.047 (focal length) / 1.8 (aperture value)), and the main If an angle of view of 38 degrees and an aperture value of 3.0 are specified in the mode, the operation of the variable aperture 610 can be controlled so that the aperture diameter is adjusted to 2.78 (=8.327 (focal length)/3.0 (aperture value)). Here, the concept of adjusting the aperture diameter is explained by applying a simplified formula for ease of understanding, but the formula or adjustment technique for adjusting the aperture diameter may also vary.

The variable aperture 610 may be provided in the first lens module 520, as illustrated in FIG. 6. Although placement stability can be ensured by providing the variable aperture 610 in the first lens module 520, the placement position of the variable aperture 610 is not limited to the first lens module 520. That is, as illustrated in (b) of FIG. 7, the variable aperture 610 may be disposed in the second lens module 530.

As described above, the folded camera module 500 according to this embodiment is arranged so that it can be used universally in selfie mode and main mode when mounted on a portable device 810 (see FIG. 10) (FIG. 8 reference).

To this end, light entrance openings for introducing light into the folded camera module 500 are formed at corresponding positions on the front (i.e., the side where the display is mounted) and the rear of the portable device 810, respectively. This is to allow the prism 110 of the prism unit 210 to rotate 90 degrees to perform a photographing operation from the front or rear of the portable device 810.

As illustrated in FIG. 8, in order to prevent foreign substances such as dust from entering the folded camera module 500, the light entrance opening formed on the front of the portable device 810 can be closed by the front cover glass 710. And, the light entrance opening formed on the front of the portable device 810 may be closed by the rear cover glass 715.

In addition, in the case of the selfie mode shooting from the front of the portable device 810, in order to capture the user's appearance relatively close, the camera is shot at a relatively wide angle compared to the main mode shooting in the opposite direction. I need to film it.

To this end, a relay lens 720 to expand the angle of view may be fixedly mounted on the light entrance opening formed on the front of the portable device 810 (see FIG. 9). The relay lens 720 may be formed as a lens group consisting of a plurality of lenses (for example, three) or may be implemented in the form of a single lens. The relay lens 720 implemented as a single lens may also be referred to as a collimator lens.

For example, referring to FIG. 9 illustrating the light inflow path in selfie mode, the lens provided in the third lens module 540 may function as a focusing lens to focus the subject, and the second lens The lens provided in the module 530 can function to change the size of the subject (variator lens), and the lens provided in the first lens module 520 is linked with the lens provided in the second lens module 530. It can be used to correct focus errors (compensator lens). In addition, the variable aperture 610 provided in the first lens module 520 can adjust the amount of incoming light, and the prism 110 refracts the light coming in through the light entrance hole and flows it into the lens unit 120. , the relay lens 720 functions to expand the angle of view when shooting in selfie mode.

Specifically, in selfie mode, the lens provided in the second lens module 530 moves toward the lens provided in the third lens module 540, and the lens provided in the third lens module 540 is finely adjusted to zoom. The function is implemented, and the diameter of the variable aperture 610 is adjusted to adjust the aperture value. In addition, the prism 110 is rotated to receive light from the front of the portable device, and a shooting operation in a wide-angle shooting mode is performed with an enlarged view angle by the relay lens 720.

In contrast, in the main mode, the lens provided in the second lens module 530 is moved toward the lens provided in the first lens module 520, and the lens provided in the third lens module 540 is finely adjusted to zoom. The function is implemented, and the diameter of the variable aperture 610 is adjusted to adjust the aperture value. Additionally, the prism 110 is rotated to receive light from the rear of the portable device, and a shooting operation in a narrow-angle shooting mode is performed.

In this way, the relay lens 720 is provided at the light entrance opening formed on the front of the portable device 810, and each lens included in the lens unit 120 is controlled to operate differently, so that the folded camera module 500 ) is generally used to photograph the front and rear directions of the portable device 810, respectively, the folded camera module 500 has the feature of functioning appropriately in each of the selfie mode and main mode.

In addition, when the relay lens 720 is fixedly mounted on the light entrance formed on the front of the portable device 810, a front cover glass 710 may be mounted on the front to protect the relay lens 720 (see Figure 10 (a)), the light entrance hole may be closed by the relay lens 720 in a form that replaces the front cover glass 710.

Although the present invention has been described above with reference to embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

110: Prism 120: Lens unit
130: Image sensor 210: Prism unit
211: Prism holder 213: Shaft
215: Magnet 217, a, b, c, d: Coil
219: Prism base 500: Folded camera module
520, 530, 540: Lens module 610: Variable aperture
710, 715: Cover glass 720: Relay lens
810: Portable device

Claims (11)

A prism unit that changes the direction of light from the incident optical axis direction to the lens optical axis direction;
a lens unit disposed in the direction of the lens optical axis so that light whose traveling direction is changed by the prism unit is incident; and
Includes an image sensor that detects light emitted from the lens unit,
The prism unit includes a prism that changes the direction of light flowing in, and the prism changes the direction of light flowing in from a direction selected from a first direction and a second direction opposite to the first direction. The prism unit is rotated to make it incident on the lens unit,
The prism unit is,
a prism holder for fixing the prism; and
It further includes a prism base arranged to surround the outside of the prism holder in a concave shape and fastened to a shaft coupled to the prism holder so that the prism holder can rotate,
A magnet is fixedly disposed on the prism holder, and when the prism holder is rotated with the shaft as the center of rotation, a plurality of magnets are installed on the inner surface of the prism base, which is concavely formed against the magnet to correspond to the path faced by the magnet. The coils are arranged to be spaced apart from each other,
The prism holder is rotated with the shaft as the rotation center by Lorentz force resulting from electromagnetic interaction between the magnet and the coil disposed on the inner surface of the prism base to which current is applied,
The prism base has a size and shape that limits the rotation angle range of the prism holder to 90 degrees,
In order to ensure that the Lorentz force is continuously generated until the prism holder is rotated by 90 degrees, the inner surface of the prism base is characterized in that it is formed in a concave shape, which is one of a [ shape, a C shape, and a C shape. A folded camera module equipped with a rotating prism.
delete delete According to paragraph 1,
By manipulating the direction of the current flowing in the plurality of coils spaced apart from each other on the inner surface of the concavely formed prism base, the prism fixed to the prism holder rotates to receive light from the first direction. A folded camera module with a rotating prism that is rotated to receive light from a second direction.
According to paragraph 1,
A folded camera module with a rotating prism, characterized in that corresponding stoppers are formed on the shaft and the prism base to limit the rotation angle of the prism holder to 90 degrees.

According to paragraph 1,
The lens unit is formed by connecting a plurality of independently manufactured lens modules to each other in the direction of the lens optical axis,
A folded camera module with a rotating prism, characterized in that the lens module located at the front is combined with the prism unit, and the lens module located at the rear is combined with the image sensor.
According to clause 6,
One of the plurality of lens modules constituting the lens unit is provided with a variable aperture for controlling the amount of light,
Corresponding to the rotation of the prism holder for photographing the first direction or photographing the second direction, the variable aperture is preset to be adjusted to different aperture diameters. Camera module.
According to clause 6 or 7,
A lens positioned between the frontmost lens module and the rearmost lens module among the plurality of lens modules, corresponding to the rotation of the prism holder for photographing the first direction or the second direction. A folded camera module with a rotating prism, wherein the lenses provided in the module are preset to be controlled to move in different directions.
According to clause 8,
A light entrance is formed on each of the front and rear sides of the body of the portable device equipped with the folded camera module to correspond to the position of the prism that is rotated 90 degrees,
A folded camera module with a rotating prism, wherein a relay lens is fixedly mounted only at the light entrance at the front of the body, so that different angles of view are applied when shooting in the front and rear directions of the portable device. .
delete According to clause 9,
A folded camera module with a rotating prism, characterized in that the relay lens is mounted at the front light entrance to replace the front cover glass.