TWI687717B - Optical image lens assembly, imaging apparatus and electronic device - Google Patents

Abstract

An optical image lens assembly includes a plurality of optical lens elements, wherein the optical lens elements include a plurality of optical lens elements made by plastic material. Each of the optical lens elements has refractive power and has at least one of an object-side surface and an image-side surface being aspheric. The optical image lens assembly includes a long-wavelength red light absorbing lens element for transmitting the visible light and absorbing the long-wavelength red light, wherein the long-wavelength red light absorbing lens element is made by plastic material and has refractive power. When a specific condition of the optical image lens assembly is satisfied, a better image quality can be obtained.

Description

Optical image lens, imaging device and electronic device

The invention relates to an optical image lens and an imaging device, in particular to a miniaturized optical image lens and an imaging device which can absorb long-wavelength red light and can be applied to electronic devices.

Existing color image sensing devices will have increased response in the blue and green channels in the long wavelength red light of 650~700nm and the infrared light region of 700nm~1000nm. The unfiltered part of this light will cause image color reproduction and color saturation The degree is not good.

Conventional conventional technology uses infrared cut coating filter (IRCF) or infrared light absorption plate (commonly known as blue glass, hereinafter referred to as BG) to filter long-wavelength red light above 650nm and near infrared light In addition, the above method has its drawbacks. Although the infrared filter has a cost advantage, when the angle of incident light is increased, the filter wavelength will move to the short wavelength direction, which reduces the amount of incident red light. The color deviation of the surrounding area relative to the central area. The center/peripheral color shift problem of the infrared light absorption plate is less than that of the infrared filter coating filter, but the cost is high and limited by the type of material, which cannot fully filter out infrared light. It is still necessary to configure the infrared filter coating film for infrared light absorption On a tablet.

The optical image lens, the imaging device and the electronic device provided by the present invention are provided with long-wavelength red light absorbing plastic lenses, and appropriately arranging the penetration distance through which the main rays pass through, which helps to obtain better imaging effect.

CP/CP0

2.0，其中，CP為光學影像鏡頭成像區域內於中心視場至1.0視場範圍之主光線穿過該長波長紅光吸收光學鏡片的穿透距離，CP0為光學影像鏡頭於中心視場之主光線穿過該長波長紅光吸收光學鏡片的穿透距離。 According to the present invention, an optical image lens is provided, which includes a plurality of optical lenses, including a plurality of plastic optical lenses, and has a refractive power and an aspheric surface. Wherein, the optical image lens is provided with a long-wavelength red light absorbing optical lens. The long-wavelength red light absorbing optical lens penetrates visible light and filters out long-wavelength red light, and is plastic and has a refractive power. Long-wavelength red light absorbing optical lenses meet the following conditions: 0.5

CP/CP0

2.0, where CP is the penetration distance of the chief ray in the imaging area of the optical image lens from the central field of view to 1.0 field of view through the long-wavelength red light absorbing optical lens, and CP0 is the principal of the optical image lens in the central field of view The penetration distance of light passing through the long-wavelength red light absorption optical lens.

According to the present invention, another imaging device is provided, which includes the optical image lens as described in the preceding paragraph and an electronic photosensitive element. The electronic photosensitive element is disposed on an imaging surface of the optical image lens.

According to the present invention, an electronic device is further provided, which is a mobile device including the image capturing device described in the preceding paragraph.

When CP/CP0 satisfies the above conditions, it helps to obtain better local color saturation, avoid imaging color shift of the off-axis field of view, and help infrared light filtering degree to obtain better imaging results.

10, 20, 30‧‧‧Electronic device

11, 21, 31‧‧‧ acquisition device

100, 200‧‧‧ aperture

101、201‧‧‧entrance center

110‧‧‧First optical lens

111‧‧‧Object side surface

112‧‧‧Image side surface

120、220‧‧‧Second optical lens

121, 221‧‧‧ Object side surface

122, 222‧‧‧ Image side surface

230‧‧‧third optical lens

231‧‧‧ Object side surface

232‧‧‧Image side surface

140, 240‧‧‧ fourth optical lens

141, 241‧‧‧ Object side surface

142, 242‧‧‧ Image side surface

150, 250 ‧‧‧ fifth optical lens

151, 251‧‧‧ Object side surface

152、252‧‧‧Image side surface

260‧‧‧Sixth optical lens

261‧‧‧Object side surface

262‧‧‧Image side surface

170, 270‧‧‧Long wavelength red light absorbing optical lens

171, 271‧‧‧ Object side surface

172、272‧‧‧Image side surface

180、280‧‧‧Infrared filter coating

190, 290‧‧‧protective glass

195, 295‧‧‧ imaging surface

196、296‧‧‧Electronic photosensitive element

CP‧‧‧The penetration distance of the chief ray in the imaging area of the optical image lens through the long-wavelength red light absorption optical lens in the range of the central field of view to 1.0 field of view

CP0‧‧‧The penetration distance of the chief ray of the optical image lens on the optical axis through the long-wavelength red light absorption optical lens

T‧‧‧ Long wavelength red light absorption optical lens transmittance

IT‧‧‧Infrared filter coating penetration rate

T4560‧‧‧Comprehensive average transmittance of all long-wavelength red light absorbing optical lenses in wavelength 450nm~600nm in optical image lens

IT4560‧‧‧Comprehensive average transmittance of infrared filter coating at wavelength 450nm~600nm

T6570‧‧‧Comprehensive average transmittance of all long-wavelength red light absorption optical lenses in the optical image lens at a wavelength of 650nm~700nm

IT6570‧‧‧Comprehensive average transmittance of infrared filter coating at wavelength 650nm~700nm

T6771‧‧‧Comprehensive average transmittance of all long-wavelength red light absorption optical lenses in the optical image lens at a wavelength of 670nm~710nm

IT6771‧‧‧Comprehensive average transmittance of infrared filter coating at wavelength 670nm~710nm

A550‧‧‧Long wavelength red light absorption optical lens absorption value at wavelength 550nm

A700‧‧‧Long-wavelength red light absorbing optical lens at 700nm

WLT50‧‧‧Infrared filter at 50% transmittance wavelength

Aperture value of FNO‧‧‧ optical image lens

CRAmax‧‧‧Maximum chief ray angle of optical image lens

TTL‧‧‧The distance of the optical image lens from the surface closest to the object side to an imaging surface

IMGH‧‧‧Maximum image height of optical image lens

In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious and understandable, the drawings are described as follows: FIG. 1 is a schematic diagram showing an image capturing device of the first embodiment of the present invention; Figure 2 is a schematic diagram of an imaging device according to a second embodiment of the invention; Figure 3 is a schematic diagram of an electronic device according to a third embodiment of the invention; Figure 4 is a schematic diagram of a fourth embodiment of the invention A schematic diagram of an electronic device; and FIG. 5 is a schematic diagram of an electronic device according to a fifth embodiment of the invention.

The invention provides an optical image lens, including a plurality of optical lenses, including a plurality of plastic optical lenses, and having a refractive power and an aspheric surface. Wherein, the optical image lens is provided with a long-wavelength red light absorbing optical lens. The long-wavelength red light absorbing optical lens penetrates visible light and filters out long-wavelength red light, and is plastic and has a refractive power.

CP/CP0

2.0，其中CP為光學影像鏡頭成像區域內於中心 視場至1.0視場範圍之主光線穿過該長波長紅光吸收光學鏡片的穿透距離，CP0為光學影像鏡頭於中心視場之主光線穿過該長波長紅光吸收光學鏡片的穿透距離。藉此，當CP/CP0趨向於1時為最佳狀態，當CP/CP0小於下限時，會導致成像色飽和度降低，而當CP/CP0大於上限時，則會使得離軸視場的成像色偏，而無法達到現有的紅外光濾除程度。較佳地，其可滿足下述條件：0.8

CP/CP0

1.2。藉此，可使光學鏡片具有50%穿透率的波長限制在適當範圍內(±7nm)。 Long-wavelength red light absorbing optical lenses meet the following conditions: 0.5

CP/CP0

2.0, where CP is the penetration distance of the chief ray in the imaging area of the optical image lens from the central field of view to 1.0 field of view through the long-wavelength red light absorbing optical lens, and CP0 is the chief ray of the optical image lens in the central field of view The penetration distance of the long-wavelength red light absorbing optical lens. In this way, when CP/CP0 tends to 1, it is the best state. When CP/CP0 is less than the lower limit, it will cause the imaging color saturation to decrease, and when CP/CP0 is greater than the upper limit, it will make the imaging of the off-axis field of view Color shift, and can not reach the existing infrared light filtering degree. Preferably, it can meet the following conditions: 0.8

CP/CP0

1.2. In this way, the wavelength of the optical lens with 50% transmittance can be limited to an appropriate range (±7nm).

50%；以及T4560

80%。藉此，可濾除長波長紅光，藉以避免影像色彩失真，又有利於光學影像鏡頭的微型化。 According to the optical image lens of the present invention, the comprehensive average transmittance of all long-wavelength red light absorbing optical lenses at a wavelength of 650 nm to 700 nm is T6570, and the comprehensive average transmittance of all long-wavelength red light absorbing optical lenses at a wavelength of 450 nm to 600 nm It is T4560, which can meet the following conditions: T6570

50%; and T4560

80%. In this way, long-wavelength red light can be filtered out to avoid image color distortion, which is also beneficial to the miniaturization of optical image lenses.

20%；以及A700/A550

10。藉此，可抑制紅外線濾除鍍膜的色偏問題。 According to the optical image lens of the present invention, the comprehensive average transmittance of all long-wavelength red light-absorbing optical lenses at a wavelength of 670 nm to 710 nm is T6771, and the long-wavelength red light-absorbing optical lenses have an absorption value of A700 at a wavelength of 700 nm and long-wavelength red The absorption value of the light-absorbing optical lens at a wavelength of 550 nm is A550, which can satisfy the following conditions: T6771

20%; and A700/A550

10. This can suppress the color shift problem of the infrared filter coating.

According to the optical image lens of the present invention, it may be provided with an aperture for controlling the maximum incident light amount of the optical image lens at the center of the imaging area, the long-wavelength red light absorbing optical lens is adjacent to the aperture, and the long-wavelength red light absorbing optical lens It can have positive refractive power on the low optical axis. In this way, the superior CP/CP0 change degree can be obtained, and the problem of peripheral color shift can be avoided.

According to the optical image lens of the present invention, the long-wavelength red light absorbing optical lens can have refractive power and aspherical surface, and the manufacturing method of the long-wavelength red light absorbing optical lens can be injection molding. This helps the optical image lens to reduce the aberration loss while achieving a better CP/CP0 value.

According to the optical image lens of the present invention, the long-wavelength red light absorbing optical lens can be made of thermoplastic plastic. This can effectively improve the optical processing accuracy of long-wavelength red light absorbing optical lenses.

According to the optical image lens of the present invention, the long wavelength red light absorbing optical lens may have a long wavelength red light absorbing component, and the long wavelength red light absorbing component is evenly distributed in the long wavelength red light absorbing optical lens. In this way, better surface accuracy and processing stability can be achieved. The long-wavelength red light absorbing component may be an organic substance or an organometallic compound, and is a commercially available product suitable for thermoplastic plastics, such as QCR Solutions Corp's NIR Absorb Materials for Plastic (Thermal Resin) series, or other suppliers' products. Similar products or products at the same level.

According to the optical image lens of the present invention, the image side is provided with an imaging surface, wherein an infrared filter coating can be provided in the optical image lens or between the optical image lens and the imaging surface. This can help filter out infrared light, reduce the material complexity of long-wavelength red light absorbing optical lenses, and improve production stability. The infrared filter coating can be disposed not only on the flat panel element between the optical image lens and the imaging surface, but also on the flatter optical lens surface in the optical image lens with a smaller incident angle of the chief ray.

In addition, cesium-based oxide materials such as CsWOx can also be added to plastic optical lenses to replace the aforementioned infrared filter coatings, which can help reduce the thickness of optical image lenses.

670nm。藉此，可使紅外線濾除鍍膜在周邊視場的短波長方向飄移被長波長紅光吸收光學鏡片遮蓋，以降低中心/周邊色偏顯著程度。較佳地，其可滿足下列條件：WLT50

690nm，並使用鍍膜層數較多的紅外線濾除鍍膜。藉此，使紅外線濾除鍍膜短波長方向飄移問題可以充分被長波長紅光吸收光學鏡片遮蓋。較佳地，其可滿足下列條件：WLT50

730nm。藉此，有助於長波長紅光吸收光學鏡片之成分單純化，改善生產穩定性。另外，前述之紅外線濾除鍍膜於50%穿透率的波長範圍係指可見紅光區域至近紅外光之間。 According to the optical image lens of the present invention, the infrared filter coating penetrates visible light and filters near-infrared rays. The wavelength of the infrared filter coating at 50% transmittance is WLT50, which can satisfy the following conditions: WLT50

670nm. In this way, the infrared filter coating can be shifted in the short-wavelength direction of the peripheral field of view and covered by the long-wavelength red light absorbing optical lens, so as to reduce the central/peripheral color shift significance. Preferably, it can meet the following conditions: WLT50

At 690nm, infrared coating with a large number of coating layers is used to remove the coating. In this way, the problem of short-wavelength drift of the infrared filter coating can be fully covered by the long-wavelength red light absorbing optical lens. Preferably, it can meet the following conditions: WLT50

730nm. In this way, it helps to simplify the components of the long-wavelength red light absorbing optical lens and improve the production stability. In addition, the wavelength range of the aforementioned infrared filter coating at a transmittance of 50% refers to between the visible red light region and near infrared light.

According to the optical image lens of the present invention, a protective glass may be additionally provided, and the infrared filter coating is provided on at least one surface of the protective glass. In this way, it helps to change the degree of CP/CP0 and avoid the problem of peripheral color shift.

According to the optical image lens of the present invention, it may have one of the aforementioned long-wavelength red light absorbing optical lenses. In this way, the filtering effect of long-wavelength red light is maintained and cost-effective. In addition, the optical image lens can be provided with one long-wavelength red light absorbing optical lens according to requirements, or more than two long-wavelength red light absorbing optical lenses can be provided to increase the width of the filtering band.

2.4；CRAmax

20；以及0.8

TTL/IMGH

3.0。藉此，以有效提升進光量，由於進光量過低則無法發揮長波長紅光吸收成分的效果，適當控制光學影像鏡頭總長度與像高的比例，可利於縮減其體積，達到微型化。 According to the optical image lens of the present invention, the f-number of the optical image lens is FNO, the maximum chief ray angle of the optical image lens is CRAmax, the distance from the object side to the imaging surface of the optical image lens is TTL, and the optical image The maximum image height of the lens is IMGH, which can meet the following conditions: FNO

2.4; CRAmax

20; and 0.8

TTL/IMGH

3.0. In this way, to effectively increase the amount of incoming light, because the amount of incoming light is too low, the effect of long-wavelength red light absorption components cannot be exerted. Properly controlling the ratio of the total length of the optical imaging lens to the image height can help reduce its volume and achieve miniaturization.

The above technical features of the optical image lens of the present invention can be combined and configured to achieve corresponding effects.

In the optical image lens provided by the present invention, if the optical image lens contains two long-wavelength red light absorbing optical lenses, the comprehensive average transmittance T6570 of all the aforementioned long-wavelength red light absorbing optical lenses at a wavelength of 650 nm to 700 nm is caused by Two long-wavelength red light absorbing optical lenses are calculated respectively after multiplying the T6570 value, and then multiplying it. If there are multiple absorbing lenses, so on.

In the optical image lens provided by the present invention, the chief ray of the optical image lens is a ray passing through the center of the entrance pupil, and the maximum image height in the imaging area is defined as a 1.0F field of view.

In the optical image lens of the present invention, the configuration of the aperture can be a front aperture or a center aperture. The configuration of the aperture is used to control the maximum light input amount of the optical image lens at the center of the imaging area. The front aperture means that the aperture is set at the object side end of the first optical lens in the imaging lens system, and the center aperture means that the aperture is set between the first optical lens and the imaging surface. If the aperture is the front aperture, the exit pupil (Exit Pupil) can form a longer distance from the imaging surface, which makes it have a telecentric effect, and can increase the efficiency of the CCD or CMOS of the electronic photosensitive element to receive images; The central aperture helps to expand the angle of view of the imaging lens system, so that the optical imaging lens has the advantages of a wide-angle lens.

The optical image lens of the present invention may be provided with at least one diaphragm, which may be located before the first optical lens, between each optical lens, or after the last optical lens. The type of the diaphragm is Glare Stop Or field stop (Field Stop), etc., can be used to reduce stray light and help improve image quality.

In the optical image lens of the present invention, an aperture, a lens barrel, a shading element, a fixing element, a protective glass, a filter element and other elements can be provided according to requirements.

In the optical image lens provided by the present invention, the optical lens and the long-wavelength red light absorbing optical lens may be plastic. When the optical lens is made of plastic, it can effectively reduce production costs. In addition, the object-side surface and the image-side surface of the optical image lens can be aspherical (ASP). The aspherical surface can be easily made into a shape other than a spherical surface. More control variables are obtained to reduce aberrations, thereby reducing the optical lens. The number used can effectively reduce the total length of the optical image lens of the present invention. In addition, the plastic material can also be replaced with resin (Resin) material.

In the optical image lens provided by the present invention, if the surface of the optical lens is convex and the position of the convex surface is not defined, it means that the surface of the optical lens can be convex at the low optical axis; if the surface of the optical lens is concave and the position of the concave surface is not defined , It means that the surface of the optical lens can be concave at the near optical axis. In the optical image lens provided by the present invention, if the optical lens has positive or negative refractive power, or the focal length of the optical lens, it can refer to the refractive power or focal length of the optical lens near the optical axis, and the optical lens has a refractive power The position can be on the near optical axis, off-axis or at the periphery.

The imaging surface of the optical image lens of the present invention may be a flat surface or a curved surface with any curvature, especially a curved surface facing the object side, depending on the corresponding electronic photosensitive element.

The optical image lens of the present invention can also be applied in various aspects to three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, somatosensory game machines, driving recorders, reversing development devices In electronic devices such as wearable products. The above-mentioned electronic device is only an example to illustrate the practical application examples of the present invention, and does not limit the application scope of the imaging device of the present invention.

The present invention provides an imaging device, which includes the aforementioned optical image lens and an electronic photosensitive element. The electronic photosensitive element is disposed on an imaging surface of the optical image lens. By setting a long-wavelength red light absorption optical lens in the optical image lens and appropriately configuring the penetration distance for the main light to pass through, it helps to obtain better local color saturation and avoid imaging in the off-axis field of view Color shift helps to filter out infrared light. Preferably, the imaging device may further include a lens barrel (Barrel Member), a supporting device (Holder Member), or a combination thereof.

The present invention provides an electronic device, which may be a mobile device including the image capturing device described in the preceding paragraph. In this way, the imaging quality can be effectively improved. Preferably, the electronic device may further include a control unit (Control Unit), a display unit (Display), a storage unit (Storage Unit), a temporary storage unit (RAM), or a combination thereof.

According to the above-mentioned embodiments, specific examples are presented below and explained in detail in conjunction with the drawings.

<First embodiment>

Please refer to FIG. 1, which is a schematic diagram of an imaging device according to a first embodiment of the present invention. It can be seen from FIG. 1 that the image capturing device of the first embodiment includes an optical image lens (not otherwise labeled) and an electronic photosensitive element 196. The optical image lens includes the entrance pupil center 101. The optical image lens includes an aperture 100, a first optical lens 110, a second optical lens 120, a long-wavelength red light absorbing optical lens 170, a fourth optical lens 140, a fifth optical lens 150, and an infrared filter in order from the object side to the image side In addition to the coating 180, the protective glass 190, and the imaging surface 195, the electronic photosensitive element 196 is disposed on the imaging surface 195 of the optical image lens.

The first optical lens 110 has a positive refractive power, the object-side surface 111 and the image-side surface 112 are both aspherical, and the first optical lens 110 is a plastic material, which is COC/COP material, such as Mitsui Chemicals' APL series Or ZEON's ZEONEX series.

The second optical lens 120 has a negative refractive power, the object-side surface 121 and the image-side surface 122 are both aspherical, and the second optical lens 120 is a plastic material.

The long-wavelength red light absorbing optical lens 170 has a negative refractive power, and both the object-side surface 171 and the image-side surface 172 are aspherical. The long-wavelength red light absorbing optical lens 170 is a thermoplastic plastic material and is manufactured by injection molding technology. The plastic material is a high-refractive polycarbonate (PC) material, such as MGC’s EP series or Teijin’s SP series. The material can also be replaced with polyester (Polyester) materials, such as OGC's OKP series. The long-wavelength red light absorbing optical lens 170 contains a long-wavelength red light absorbing component, which is a commercially available injection molding grade organometallic compound absorbing component, and the long-wavelength red light absorbing component is uniformly mixed with the long-wavelength red light Absorb the optical lens 170.

The fourth optical lens 140 has a positive refractive power, the object-side surface 141 and the image-side surface 142 are both aspherical, and the fourth optical lens 140 is a plastic material.

The fifth optical lens 150 has a negative refractive power, the object-side surface 151 and the image-side surface 152 are both aspherical, and the fifth optical lens 150 is a plastic material.

The protective glass 190 is disposed between the fifth optical lens 150 and the imaging surface 195 and does not affect the focal length of the optical image lens.

The infrared filter coating 180 is disposed on the object-side surface (not otherwise labeled) of the protective glass 190, and is located between the optical image lens and the imaging surface 195. The infrared filter coating 180 allows visible light to penetrate and filter near infrared rays.

The FNO of the optical image lens is 2.00, the maximum CRA of the optical image lens is 35.8 degrees, and the TTL/IMGH of the optical image lens is 1.36.

Refer to Table 1 below.

Table 1 is the detailed CP and CP/CP0 data of each optical lens in the first embodiment of FIG. 1, in which P1-P5 sequentially indicate the first optical lens 110, the second optical lens 120, and the length from the object side to the image side. The wavelength red light absorbing optical lens 170, the fourth optical lens 140 and the fifth optical lens 150.

In the first embodiment, the long-wavelength red light absorption optical lens in the optical imaging lens is set in the third optical lens, and the CP/CP0 value falls within 0.98~1.04, which is the best choice for this embodiment, but if production is considered As a factor, the long-wavelength red light absorbing optical lens 170 can also be configured as the first optical lens, and its CP/CP0 value is between 1.0 and 1.09, which is also an excellent choice.

Refer to Table 2 below. T is the transmittance of the long-wavelength red light absorbing optical lens, IT is the transmittance of the infrared filter coating, T4560 is the comprehensive average transmittance of the long-wavelength red light absorbing optical lens at a wavelength of 450nm to 600nm , T6570 is the comprehensive average transmittance of long-wavelength red light absorbing optical lens at wavelength 650nm~700nm, T6771 is the comprehensive average transmittance of long-wavelength red light absorbing optical lens at wavelength 670nm~710nm, A550 is long-wavelength red light absorption The absorption value of the optical lens at a wavelength of 550 nm, A700 is the absorption value of a long-wavelength red light absorption optical lens at a wavelength of 700 nm.

Table 2 is the transmittance data of the long-wavelength red light absorbing optical lens 170 and the infrared filter coating 180 in the first embodiment, where the infrared filter The WLT50 of the removal coating 180 is 709nm, but if you want to reduce the cost of the infrared removal coating 180, you can adjust the WLT50 to 680~690nm to relax the coating number requirements and production specifications of the infrared removal coating 180. In addition, the definitions of the data in the tables of the following embodiments are the same as those in Tables 1 to 2 of the first embodiment, and will not be described in detail later.

<Second Embodiment>

Please refer to FIG. 2, which is a schematic diagram of an image capturing device according to a second embodiment of the present invention. It can be seen from FIG. 2 that the image capturing device of the second embodiment includes an optical image lens (not otherwise labeled) and an electronic photosensitive element 296. The optical image lens includes the entrance pupil center 201. The optical image lens includes an aperture 200, a long-wavelength red light absorption optical lens 270, a second optical lens 220, a third optical lens 230, a fourth optical lens 240, a fifth optical lens 250, and a sixth in order from the object side to the image side The optical lens 260, the infrared filter coating 280, the protective glass 290, and the imaging surface 295, and the electronic photosensitive element 296 is disposed on the imaging surface 295 of the optical image lens.

The iris 200 is used to control the maximum light input of the optical imaging lens at the center of the imaging area.

The long-wavelength red light absorbing optical lens 270 has a positive refractive power, and both the object-side surface 271 and the image-side surface 272 are aspherical, and the long-wavelength red-light absorbing optical lens 270 is adjacent to the aperture 200. The long-wavelength red light absorbing optical lens 270 is a thermoplastic plastic material and is manufactured by injection molding technology. The plastic material is a cycloolefin polymer (COC/COP) material. The long-wavelength red light absorbing optical lens 270 contains a long-wavelength absorbing component, which is A commercially available injection molding grade organic absorption type component, and the long wavelength red light absorption component are uniformly mixed in the long wavelength red light absorption optical lens 270.

The second optical lens 220 has a negative refractive power, and both the object-side surface 221 and the image-side surface 222 are aspherical, and the second optical lens 220 is a plastic material and is manufactured by injection molding technology. The plastic material is high refractive polycarbonate Ester (PC) materials, such as MGC's EP series or Teijin's SP series.

The third optical lens 230 has a negative refractive power, the object-side surface 231 and the image-side surface 232 are both aspherical, and the third optical lens 230 is a plastic material.

The fourth optical lens 240 has a positive refractive power, the object-side surface 241 and the image-side surface 242 are both aspherical, and the fourth optical lens 240 is a plastic material.

The fifth optical lens 250 has a negative refractive power, the object-side surface 251 and the image-side surface 252 are both aspherical, and the fifth optical lens 250 is a plastic material.

The sixth optical lens 260 has a negative refractive power, the object-side surface 261 and the image-side surface 262 are both aspherical, and the sixth optical lens 260 is a plastic material.

The protective glass 290 is disposed between the sixth optical lens 260 and the imaging surface 295 and does not affect the focal length of the optical image lens.

The infrared filter coating 280 is disposed on the object-side surface (not otherwise labeled) of the protective glass 290 and is located between the optical image lens and the imaging surface 295. The infrared filter coating 280 allows visible light to penetrate and filter near infrared rays.

Cesium-based oxide materials can also be used to replace infrared filter coatings, such as tungsten oxide cesium compound (CsWOx), which can be placed on the surface of the optical lens or evenly distributed in the optical lens to achieve the infrared light filtering effect and Visible light has a low absorption effect, and when the material is used in the optical image lens, it can selectively replace the infrared filter coating 280.

The FNO of the optical image lens is 1.80, the maximum CRA of the optical image lens is 35.0 degrees, and the TTL/IMGH of the optical image lens is 1.48.

Refer to Table 3 below.

Table 3 shows the CP and CP/CP0 data of each optical lens in the second embodiment, in which P1-P6 sequentially represent the long-wavelength red light absorbing optical lens 270, the third optical lens 220, and the third optical from the object side to the image side The lens 230, the fourth optical lens 240, the fifth optical lens 250, and the sixth optical lens 260.

In the first implementation, the long-wavelength red light absorbing optical lens in the optical image lens is set in the first optical lens 210, and its CP/CP0 value falls within 1.00~1.09, which is the optimal choice for this embodiment, but if production is considered As a factor, the long-wavelength red light absorbing optical lens 270 can also be configured on the second optical lens, and its CP/CP0 value is between 1.00 and 1.14, which is also an excellent choice.

Refer to Table 4 below.

Table 4 shows the detailed transmittance data of the long-wavelength red light absorbing optical lens 270 and the infrared filter coating 280 in the second embodiment. The infrared filter coating 280 has a transmission wavelength of about 709 nm at 50%.

In the second embodiment, the definitions of the parameters are the same as those in the first embodiment, and will not be repeated here.

<Third Embodiment>

Please refer to FIG. 3, which is a schematic diagram of an electronic device 10 according to a third embodiment of the invention. The electronic device 10 of the third embodiment is a smart phone. The electronic device 10 includes an imaging device 11 that includes an optical image lens (not shown) and an electronic photosensitive element (not shown) according to the present invention. The electronic photosensitive element is arranged on the imaging surface of the optical image lens.

<Fourth embodiment>

Please refer to FIG. 4, which is a schematic diagram of an electronic device 20 according to a fourth embodiment of the invention. The electronic device 20 of the fourth embodiment is a tablet computer. The electronic device 20 includes an image capturing device 21, and the image capturing device 21 includes an optical image lens (not shown) and an electronic photosensitive element (not shown) according to the present invention, wherein The electronic photosensitive element is disposed on the imaging surface of the optical image lens.

<Fifth Embodiment>

Please refer to FIG. 5, which is a schematic diagram of an electronic device 30 according to a fifth embodiment of the present invention. The electronic device 30 of the fifth embodiment is a wearable device. The electronic device 30 includes an image capturing device 31. The image capturing device 31 includes an optical image lens (not shown) and an electronic photosensitive element (not shown) according to the present invention. (Reveal), wherein the electronic photosensitive element is disposed on the imaging surface of the optical image lens.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person who is familiar with this art can make various modifications and retouching without departing from the spirit and scope of the present invention, so the present invention is protected The scope shall be determined by the scope of the attached patent application.

100‧‧‧ aperture

101‧‧‧entrance center

110‧‧‧First optical lens

111‧‧‧Object side surface

112‧‧‧Image side surface

120‧‧‧Second optical lens

121‧‧‧ Object side surface

122‧‧‧Image side surface

140‧‧‧Fourth optical lens

141‧‧‧ Object side surface

142‧‧‧Image side surface

150‧‧‧Fifth optical lens

151‧‧‧Object side surface

152‧‧‧ Image side surface

170‧‧‧Long wavelength red light absorbing optical lens

171‧‧‧Object side surface

172‧‧‧Image side surface

180‧‧‧Infrared filter coating

190‧‧‧Protective glass

195‧‧‧Imaging surface

196‧‧‧Electronic photosensitive element

CP‧‧‧Optical image lens imaging area in the central field of view to 1.0 field of view of the main light through the long wavelength red light absorption optical lens penetration distance

CP0‧‧‧The penetration distance of the chief ray of the optical image lens in the central field of view through the long-wavelength red light absorption optical lens

Claims (27)

An optical image lens, comprising: a plurality of optical lenses, including a plurality of plastic optical lenses, and having a refractive power and an aspheric surface; wherein, the optical image lens is provided with a long-wavelength red light absorbing optical lens, the long-wavelength red The light-absorbing optical lens is transparent to the visible light and filters out the long-wavelength red light, and is plastic and has a refractive power; the long-wavelength red-light-absorbing optical lens meets the following conditions: 0.5

CP/CP0

2.0; where CP is the penetration distance of the chief ray in the imaging area of the optical image lens from the central field of view to 1.0 field of view through the long-wavelength red light absorbing optical lens, and CP0 is the central field of view of the optical image lens The penetration distance of the chief ray passing through the long-wavelength red light absorbing optical lens. The optical image lens as described in item 1 of the patent application range, wherein all the long-wavelength red light-absorbing optical lenses have a combined average transmittance of T6570 at a wavelength of 650 nm to 700 nm, and all the long-wavelength red light-absorbing optical lenses at a wavelength of 450 nm The comprehensive average penetration rate of ~600nm is T4560, which meets the following conditions: T6570

50%; and T4560

80%. The optical image lens as described in item 2 of the patent application scope, which meets the following conditions: 0.8

CP/CP0

1.2; where CP is the penetration distance of the chief ray in the imaging area of the optical image lens from the central field of view to 1.0 field of view through the long-wavelength red light absorbing optical lens, and CP0 is the central field of view of the optical image lens The penetration distance of the chief ray passing through the long-wavelength red light absorbing optical lens. The optical image lens as described in item 1 of the patent application range, in which the comprehensive average transmittance of all the long-wavelength red light absorbing optical lenses at a wavelength of 670nm to 710nm is T6771, and the long-wavelength red light absorbing optical lenses at a wavelength of 700nm The absorption value is A700, and the absorption value of the long-wavelength red light-absorbing optical lens at a wavelength of 550 nm is A550, which satisfies the following conditions: T6771

20%; and A700/A550

10. An optical image lens as described in item 1 of the patent application range, wherein the optical image lens is provided with an aperture, the long-wavelength red light absorbing optical lens is adjacent to the aperture, and the long-wavelength red light absorbing optical lens is near the optical axis It has positive refractive power. The optical image lens as described in item 2 of the patent application range, wherein the long-wavelength red light absorbing optical lens has refractive power and aspherical surface, and the long-wavelength red light absorbing optical lens is manufactured by injection molding. The optical image lens as described in item 6 of the patent application range, wherein the long-wavelength red light absorbing optical lens is made of thermoplastic plastic. The optical image lens as described in item 7 of the patent application range, wherein the long-wavelength red light absorbing optical lens has a long-wavelength red light absorbing component, and the long-wavelength red light absorbing component is evenly distributed in the long-wavelength red light absorbing optical lens . The optical image lens as described in item 7 of the patent application scope meets the following conditions: 0.8

CP/CP0

1.2; where CP is the penetration distance of the chief ray in the imaging area of the optical image lens from the central field of view to 1.0 field of view through the long-wavelength red light absorbing optical lens, and CP0 is the central field of view of the optical image lens The penetration distance of the chief ray passing through the long-wavelength red light absorbing optical lens. The optical image lens as described in item 7 of the patent application range, in which the comprehensive average transmittance of all the long-wavelength red light absorbing optical lenses at a wavelength of 670nm to 710nm is T6771, and the long-wavelength red light absorbing optical lenses at a wavelength of 700nm The absorption value is A700, and the absorption value of the long-wavelength red light-absorbing optical lens at a wavelength of 550 nm is A550, which satisfies the following conditions: T6771

20%; and A700/A550

10. The optical image lens as described in item 7 of the patent application range, wherein the optical image lens is provided with an aperture, the long-wavelength red light absorbing optical lens is adjacent to the aperture, and the long-wavelength red light absorbing optical lens is near the optical axis It has positive refractive power. As described in Item 7 of the patent application scope, the image side of the optical image lens is provided with an imaging surface, and an infrared filter coating is provided in the optical image lens or between the optical image lens and the imaging surface. An optical image lens as described in item 12 of the patent application range, wherein the infrared filter coating penetrates visible light and filters near-infrared rays. The wavelength of the infrared filter coating at 50% transmittance is WLT50, which satisfies the following Condition: WLT50

670nm. The optical image lens as described in item 13 of the patent application range, wherein the wavelength of the infrared filter coating at 50% transmittance is WLT50, which satisfies the following conditions: WLT50

690nm. The optical image lens as described in item 13 of the patent application range, wherein the wavelength of the infrared filter coating at 50% transmittance is WLT50, which satisfies the following conditions: WLT50

730nm. An optical image lens as described in item 13 of the patent application range, wherein the optical image lens is further provided with a protective glass in front of the imaging, and the infrared filter coating is provided on at least one surface of the protective glass. The optical image lens as described in item 13 of the patent application range, wherein the optical image lens has a long-wavelength red light absorbing optical lens. The optical image lens as described in item 13 of the patent application scope meets the following conditions: 0.8

CP/CP0

1.2; where CP is the penetration distance of the chief ray in the imaging area of the optical image lens from the central field of view to 1.0 field of view through the long-wavelength red light absorbing optical lens, and CP0 is the central field of view of the optical image lens The penetration distance of the chief ray passing through the long-wavelength red light absorbing optical lens. The optical image lens as described in item 13 of the patent application range, in which the comprehensive average transmittance of all the long-wavelength red light absorbing optical lenses at a wavelength of 670nm to 710nm is T6771, and the long-wavelength red light absorbing optical lenses at a wavelength of 700nm The absorption value is A700, and the absorption value of the long-wavelength red light-absorbing optical lens at a wavelength of 550 nm is A550, which satisfies the following conditions: T6771

20%; and A700/A550

10. An optical image lens as described in item 13 of the patent application range, wherein the optical image lens is provided with an aperture, the long-wavelength red light absorbing optical lens is adjacent to the aperture, and the long-wavelength red light absorbing optical lens is near the optical axis It has positive refractive power. According to the optical image lens described in Item 2 of the patent application scope, an image plane is provided on the image side of the optical image lens, and an infrared filter coating is provided in the optical image lens or between the optical image lens and the image plane. The optical image lens as described in Item 21 of the patent application range, wherein the infrared filter coating penetrates in visible light and filters in near infrared rays, and the wavelength of the infrared filter coating at 50% transmittance is WLT50, which satisfies the following Condition: WLT50

670nm. The optical image lens as described in item 21 of the patent application range, wherein the wavelength of the infrared filter coating at 50% transmittance is WLT50, which satisfies the following conditions: WLT50

690nm. The optical image lens as described in item 21 of the patent application range, wherein the wavelength of the infrared filter coating at 50% transmittance is WLT50, which satisfies the following conditions: WLT50

730nm. According to the optical image lens described in item 1 of the patent application range, the aperture value of the optical image lens is FNO, and the maximum chief ray angle of the optical image lens is CRAmax, wherein the distance of the optical image lens from the object side to the imaging surface is TTL, the maximum image height of the optical imaging lens is IMGH, which meets the following conditions: FNO

2.4; CRAmax

20; and 0.8

TTL/IMGH

3.0. An imaging device includes: the optical image lens as described in item 1 of the patent application scope; and an electronic photosensitive element, which is disposed on an imaging surface of the optical image lens. An electronic device is a mobile device, which includes: the imaging device as described in item 26 of the patent application scope.

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