CN208026968U - Cemented lens - Google Patents
Cemented lens Download PDFInfo
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- CN208026968U CN208026968U CN201820473954.8U CN201820473954U CN208026968U CN 208026968 U CN208026968 U CN 208026968U CN 201820473954 U CN201820473954 U CN 201820473954U CN 208026968 U CN208026968 U CN 208026968U
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Abstract
A kind of cemented lens helps avoid leading to optical property variation etc. because bonding agent is removed.Cemented lens has plastic first lens and the second lens using bonding agent engagement, first lens, refractive index >=1.4 of the second lens and bonding agent and≤1.7, the region of first lens engaged with the second lens includes concavity lens face and the first lens side outer region, the region of second lens engaged with the first lens includes convex lens face and the second lens side outer region, the region vapor deposition engaged with the first lens in the region of the first lens engaged with the second lens and/or the second lens have single layer by being selected from SiO2、BaF2、S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 material constitute transparent material layer.
Description
Technical field
The utility model is related to cemented lens, more particularly to using bonding agent engagement plastic first lens and
The cemented lens of plastic second lens.
Background technology
In the past, there is a kind of cemented lens, as shown in figure 4, it has utilize bonding agent PTX to engage plastic first thoroughly
Mirror 14X and plastic second lens 15X.
Specifically, as shown in figure 4, the region of the first lens 14X engaged with the second lens 15X includes concavity lens face
141X and the first lens side outer region 142X for surrounding concavity lens face 141X in peripheral side, the second lens 15X with
The region of first lens 14X engagement includes the convex lens face 151X opposite with concavity lens face 141X and will be convex in peripheral side
The second lens side outer region 152X that shape lens face 151X is surrounded, also, to avoid the first lens 14X and the second lens 15X
The surface being interconnected between interval generate deviation, be formed in the second lens side outer region 152X towards the first lens
Protrusion 153X side outer region 142X protrusions and abutted with the first lens side outer region 142X.
When manufacturing above-mentioned cemented lens, such as bonding agent PTX is first coated on to the concavity lens face of the first lens 14X
141X and the first lens side outer region 142X with concavity lens face 141X adjacent portions, then make the first lens 14X
Concavity lens face 141X and the second lens 15X convex lens face 151X it is close, until the second lens 15X the second lens side
Protrusion 153X in outer region 152X is abutted with the first lens side outer region 142X of the first lens 14X, at this point, bonding agent
PTX is extruded and extends, and the effective diameter region at least be full of cemented lens (corresponds to concavity lens face 141X and convex
Lens face 151X) and a part adjacent thereto.Then, from the outside of the first lens 14X or the second lens 15X to lens lighting
Ultraviolet light makes bonding agent cure using the ultraviolet light across lens, to engage the first lens 14X with the second lens 15X.
But, in the manufacturing process of above-mentioned cemented lens, when using making bonding agent cure across the ultraviolet light of lens,
Will produce convergent force in bonding agent, when bonding agent and the first lens, the second lens the surface being interconnected between it is bonding
When intensity is insufficiently resistant to above-mentioned convergent force, bonding agent will be from the surface that the needs of the first lens, the second lens are interconnected
Stripping causes to generate thin air layer on the surface that the needs of bonding agent and the first lens, the second lens are interconnected
The problems such as mirror fails or optical property is deteriorated.
Particularly, since the adhesive strength between bonding agent and plastics is than bonding strong between bonding agent and metal, glass
Spend it is weak, therefore above-mentioned cemented lens easy to produce lens failure or optical property be deteriorated the problems such as.
In addition, in practice, because of factors such as preservation states, the surface of the first lens and the second lens before being bonded has
When also will produce the problems such as oxidation or weatherability are rotten, lead to the surface of uncured bonding agent and the first lens, the second lens
Between compatibility be deteriorated, bonding agent is not easy to attach to the surface of the first lens, the second lens, in this case, manufacture
Also the problems such as will produce lens failure or optical property variation when above-mentioned cemented lens.
Utility model content
The utility model is precisely in order to solving described problem and completing, the purpose of this utility model is to provide one kind to connect
Lens are closed, help avoid that lens failure or optical property is led to problems such as to be deteriorated because of the stripping of bonding agent.
To achieve the goals above, the utility model provides a kind of cemented lens, has the modeling using bonding agent engagement
Expect the first lens of system and plastic second lens, the refraction of first lens, second lens and the bonding agent
Rate >=1.4 and≤1.7, wherein the region of first lens engaged with second lens include concavity lens face and
In the first lens side outer region that peripheral side surrounds the concavity lens face, second lens with first lens
The region of engagement include the convex lens face opposite with the concavity lens face and in peripheral side by the convex lens bread
The the second lens side outer region enclosed, in the region of first lens engaged with second lens and/or described second
Vapor deposition has the transparent material layer of single layer in the region of lens engaged with first lens, and the transparent material layer is by being selected from
SiO2、BaF2、S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3, at least one of OM-4 material constitute.
Herein, refractive index refers to the wavelength of sodium light D lines.In addition, S4F, S5FOM-4 refer to the production of CANON OPTRON companies
The material sold on the market, wherein the main component of S4F and S5F is SiO2And Al2O3, the main component of OM-4 is ZrO2
And Al2O3。
Cemented lens according to the present utility model, it is saturating in the region of the first lens engaged with the second lens and/or second
Vapor deposition has the transparent material layer of single layer in the region of mirror engaged with the first lens, and the transparent material layer is by being selected from SiO2、BaF2、
S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 material constitute, therefore, though the first lens before being bonded and
The surfaces of second lens generates oxidation or weatherability is rotten etc., coating adhesive and makes painting between the first lens and the second lens
Be distributed between the first lens and the second lens bonding agent solidification when, bonding agent be not easy to from transparent material layer remove, be not easy because
The stripping of bonding agent and unnecessary air layer is generated between the first lens and the second lens, also, due to SiO2、BaF2、
S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 refractive index >=1.4 and≤1.7, with the first lens, the second lens and
The refractive index of bonding agent is close, therefore, help avoid because transparent material layer there are due to lead to unnecessary reflection etc., and have
The problems such as helping avoid refraction.
In addition, in the cemented lens of the utility model, preferably in the concavity lens face and/or the convex lens face
Upper vapor deposition has the transparent material layer.
Concavity lens face and convex lens face constitute the effective diameter region of cemented lens, if in concavity lens face and convex
Air layer is generated between lens face because of the stripping of bonding agent, then the optical property of cemented lens can be seriously affected, according to this reality
It is helped avoid with novel cemented lens by the way that transparent material layer is deposited on concavity lens face and/or convex lens face
Due to the stripping of bonding agent air layer is generated in the effective diameter region of cemented lens.
In addition, in the cemented lens of the utility model, preferably in first lens side outer region and described second
A side in the outer region of lens side is formed with towards the protrusion that another party is prominent and is abutted with the another party.
Cemented lens according to the present utility model, between the surface being interconnected for helping avoid first the second lens of lens
Interval generate deviation.
In addition, in the cemented lens of above structure, can be used with lower structure：In the outer region of first lens side
It is formed with the recess portion circumferentially in a manner of surrounding the concavity lens face, protrusion side more outer than the recess portion.
Cemented lens according to the present utility model, during fabrication, even if in the concavity lens face of the first lens and/or second
The convex lens face of lens is coated with more bonding agent, saturating in the concavity lens face and the convex of the second lens for making the first lens
Minute surface is close and makes the protrusion in the second lens side outer region of the second lens and the first lens side perimeter region of the first lens
Bonding agent is extruded and is extended from concavity lens face, convex lens face towards peripheral side when domain abuts, and is extended towards peripheral side
Bonding agent can also be stored by recess portion, therefore the outside for being not easy to leak to the first lens and the second lens is not easy because leaking to first
The bonding agent of lens and the second outer and cause to lead to the problem of when cemented lens is assembled in other components.
In addition, in the cemented lens of above structure, can be used with lower structure：The recess portion and the concavity lens face point
From, in first lens side first area between the recess portion and the concavity lens face of outer region and/or
Vapor deposition has the transparent material layer in the second area corresponding with the first area of second lens side outer region.
When manufacturing cemented lens, usually first by bonding agent prime coats, in the concavity lens face of the first lens, (second thoroughly
The convex lens face of mirror), then make the first lens concavity lens face and the second lens convex lens face it is close and make bonding agent
It is extended from concavity lens face, convex lens face towards peripheral side, therefore, from concavity lens face, convex lens face towards peripheral side
From the first lens, the sur-face peeling of the second lens when the bonding agent of extension is easy due tos the deficiency of amount waits in solidification, also, upper
When stating the stripping for generating bonding agent in first area and/or second area, which is easy to spread to concavity lens face and convex
Between lens face, in this regard, according to the cemented lens of above structure, by being deposited in above-mentioned first area and/or second area
Transparent material layer is helped avoid generating the stripping of bonding agent in above-mentioned first area and/or second area, be avoided because above-mentioned
The bonding agent stripping generated in first area and/or second area is spread between concavity lens face and convex lens face and serious
Influence the optical property of cemented lens.
Particularly, because of the presence of above-mentioned recess portion, the bonding agent that is extended from concavity lens face, convex lens face towards peripheral side
It readily flows into recess portion and bonding agent is caused to be removed from the surface side of second lens opposite with above-mentioned recess portion, therefore, lead to
It crosses and transparent material layer is deposited in second area, help reliably to avoid because in above-mentioned first area and/or second area
The bonding agent stripping of generation spreads between concavity lens face and convex lens face and seriously affects the optical property of cemented lens.
In addition, in the cemented lens of the utility model, between the preferably described concavity lens face and the convex lens face
Interval >=1 μm and≤20 μm.
It is saturating with convex to be filled in concavity lens face with contributing to bonding agent exhaustive for cemented lens according to the present utility model
Between minute surface.
In addition, in the cemented lens of above structure, can be used with lower structure：The first area and the second area
Between interval >=20 μm and≤50 μm.
Cemented lens according to the present utility model helps avoid generating in the molding of the first lens (the second lens)
Burr make the first lens and the second lens close to when contacted with the second lens (the first lens) and damage the second lens (first thoroughly
Mirror), generate clast and influence the optical property etc. of cemented lens.
(utility model effect)
According to the utility model, in the region of the first lens engaged with the second lens and/or the second lens and first
Vapor deposition has the transparent material layer of single layer in the region of lens engagement, and the transparent material layer is by being selected from SiO2、BaF2、S4F、S5F、
YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 material constitute, therefore, even if the first lens before being bonded and the second lens
Surface generate oxidation or weatherability is rotten etc., coating adhesive and make to be coated on first between the first lens and the second lens
When bonding agent between lens and the second lens cures, bonding agent is not easy to remove from transparent material layer, is not easy because of bonding agent
It removes and generates unnecessary air layer between the first lens and the second lens, also, due to SiO2、BaF2、S4F、S5F、
YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 refractive index >=1.4 and≤1.7, with the first lens, the second lens and bonding agent
Refractive index is close, therefore, help avoid because transparent material layer there are due to lead to unnecessary reflection etc., and help avoid
The problems such as refraction.
Description of the drawings
Fig. 1 is the integrally-built sectional view for the lens unit for schematically illustrating the cemented lens including the utility model.
Fig. 2 is the sectional view of the structure for the cemented lens for schematically illustrating the utility model.
Fig. 3 is the transparent material layer for schematically illustrating the first lens and the second lens that the cemented lens of the utility model includes
Dispensing area figure.
Fig. 4 is the sectional view for the structure for schematically illustrating existing cemented lens.
(symbol description)
1 lens unit
11 lens
12 lens
13 lens
14 first lens
141 concavity lens faces
142 first lens side outer region
15 second lens
151 convex lens faces
152 second lens side outer region
20 lens barrels
21 cylindrical body parts
211 small diameter portions
212 first central diameter portions
213 second central diameter portions
214 third central diameter portions
215 large-diameter portions
22 annular flange portions
23 cyclic annular protrusions
24 annular base plate portions
30 infrared filters
PT bonding agents
PM1, PM2 transparent material layer
Specific implementation mode
In the following, in conjunction with attached drawing, the embodiment of the lens unit of the cemented lens with the utility model is illustrated.
In the following description, " object side L1 " and " image side L2 " refer to object side on optical axis L direction (below sometimes
Referred to as front side) and image side (following sometimes referred to as rear side), also, " optical axis direction " refers to the direction parallel with optical axis L.
Fig. 1 is the integrally-built sectional view for the lens unit for schematically illustrating the cemented lens including the utility model,
Fig. 2 is the sectional view of the structure for the cemented lens for schematically illustrating the utility model, and Fig. 3 is to schematically illustrate connecing for the utility model
Close the figure of the dispensing area of the transparent material layer of the first lens and the second lens that lens include.
As shown in Figure 1, lens unit 1 has the multiple lens arranged along optical axis direction and keeps the lens barrel of this multiple lens
20。
Herein, lens unit 1 includes five lens arranged along optical axis direction, be successively from the L1 of object side lens 11,
Lens 12, lens 13, the first lens 14 and the second lens 15, wherein the first lens 14 and the second lens 15 constitute this practicality newly
The cemented lens of type；Also, barn door (not shown) is provided between lens 12 and lens 13, in lens 13 and the first lens
It is provided with aperture (not shown) between 14, configured with infrared filter 30 and is being clapped by the position of image side L2 than the second lens 15
Take the photograph element (not shown).Specifically, lens 11 have negative focal power (power), the surface of object side L1 is convex, as
The surface (central part) of side L2 is concave；Lens 12 have negative focal power, and the surface of object side L1 is generally planar, as
The surface (central part) of side L2 is concave；Lens 13 have positive focal power, and the surface (central part) of object side L1 is in
The surface of convex, image side L2 is convex；First lens 14 have negative focal power, and the surface (central part) of object side L1 is in
The surface (central part) of concavity, image side L2 is also concave；Second lens 15 have positive focal power, the surface of object side L1
Convex, the surface of image side L2 is also convex.Also, lens 11 are for example made of glass, lens 12, lens 13, the first lens
14 and second lens 15 be for example made of plastics, however, it is not limited to this, also material appropriate can be selected to make as needed
Make lens 11, lens 12, lens 13, the first lens 14 and the second lens 15.
In addition, lens barrel 20 is for example formed from a resin, there is the cylindrical body part 21 extended along optical axis direction, from tubular master
The front end (i.e. the end of object side L1) in body portion 21 radially the expanding annular flange portion 22 in outside, before cylindrical body part 21
End is towards object side L1 cyclic annular protrusions 23 outstanding and from the rear end (i.e. the end of image side L2) of cylindrical body part 21 nearby towards diameter
The annular base plate portion 24 protruded inwardly, also, on the inner peripheral surface of cylindrical body part 21 from image side L2 towards object side L1 according to
It is secondary be formed with small diameter portion 211, the internal diameter first central diameter portion 212 bigger than small diameter portion 211, internal diameter it is bigger than the first central diameter portion 212 the
Big bigger than third central diameter portion 214 of two central diameter portions 213, internal diameter the third central diameter portion 214 bigger than the second central diameter portion 213 and internal diameter
Diameter portion 215, wherein the rear end of small diameter portion 211 is connected with annular base plate portion 24.
In addition, the rear end face of the second lens 15 is abutted with the front end face in annular base plate portion 24, the peripheral surface of the second lens 15
It is detached with small diameter portion 211；The rear end face of first lens 14 is connected to the stage portion between small diameter portion 211 and the first central diameter portion 212,
The peripheral surface of the rear end side of first lens 14 is abutted with the inner peripheral surface in the first central diameter portion 212；The rear end face of lens 13 and first is thoroughly
The front end face of mirror 14 abuts, and the peripheral surface of the rear end side of lens 13 is abutted with the inner peripheral surface in the second central diameter portion 213；After lens 12
End face is abutted with the front end face of lens 13, and the peripheral surface of the rear end side of lens 12 is abutted with the inner peripheral surface in third central diameter portion 214；Thoroughly
The rear end face of mirror 11 is abutted with the front end face of lens 12, and the peripheral surface of lens 11 is abutted with the inner peripheral surface of large-diameter portion 215, and ring-type is prominent
Radially inside rivets and is abutted from object side L1 with lens 11 for the front end in portion 23.
In addition, in lens barrel 20, infrared filter 30 is held in the rear end face in annular base plate portion 24.
In addition, as shown in Fig. 2, the region of the first lens 14 engaged with the second lens 15 include concavity lens face 141 with
And the first lens side outer region 142 for surrounding concavity lens face 141 in peripheral side, the second lens 15 with the first lens 14
The region of engagement includes the convex lens face 151 opposite with concavity lens face 141 and wraps convex lens face 151 in peripheral side
It encloses and the second lens side outer region 152 opposite with the first lens side outer region 142.Also, in the second lens side periphery
It is formed in region 152 and protrudes towards the first lens side outer region 142 and abut with the first lens side outer region 142
Protrusion 153 is formed in a manner of surrounding concavity lens face 141 circumferentially in the first lens side outer region 142
Recess portion 143 (it can be formed continuously in a circumferential, also can be circumferentially intermittently formed), raised part 153 is than 143 outer circumferential side of recess portion
Side.Also, recess portion 143 is detached with concavity lens face 141 (on the direction vertical with optical axis), the first lens side outer region
142 there is first area 144, the second lens side outer region 152 to have and this between recess portion 143 and concavity lens face 141
144 corresponding second area 154 of first area.
Herein, interval >=1 μm preferably between concavity lens face 141 and convex lens face 151 and≤20 μm, also,
Interval >=20 μm between one region 144 and second area 154 and≤50 μm.
In addition, as shown in Fig. 2, the first lens 14 and the second lens 15 utilize bonding agent PT (the e.g. purples of acrylic compounds
Outside line curing type bonding agent) it is interconnected.
Herein, the refractive index (i.e. the wavelength of sodium light D lines) >=1.4 of the first lens 14, the second lens 15 and bonding agent PT and
≤1.7。
In addition, as shown in figure 3, in the region of the first lens 14 engaged with the second lens 15 and the second lens 15 and
Vapor deposition has transparent material layer PM1, PM2 of single layer in the region of one lens 14 engagement, and the transparent material layer PM1, PM2 are preferably by selecting
From SiO2、BaF2、S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 material constitute.
Herein, the concavity lens face 141 of the first lens 14 and from the concavity lens face 141 to recess portion 143 substantially
Vapor deposition has a transparent material layer PM1 in the region of half, and in the convex lens face 151 of the second lens 15 and from the convex lens
Vapor deposition has transparent material layer PM2 in face 151 to region corresponding with the substantially half of recess portion 143.
Hereinafter, being illustrated to an example of the manufacturing method of the cemented lens of the utility model.
First, the concavity lens face 141 of the first lens 14 and from the concavity lens face 141 to recess portion 143 substantially
Transparent material layer PM1 is deposited in the region of half, and in the convex lens face 151 of the second lens 15 and from the convex lens face
151 to vapor deposition transparent material layer PM2 in region corresponding with the substantially half of recess portion 143.
Then, bonding agent PT is coated on to the concavity lens face 141 and the first lens side outer region 142 of the first lens 14
With 141 adjacent portion of concavity lens face.
Then, make concavity lens face 141 and the convex lens face 151 of the second lens 15 of the first lens 14 close, until
First lens side outer region of protrusion 153 and the first lens 14 in the second lens side outer region 152 of the second lens 15
142 abut.At this point, bonding agent is extruded and extends, at least be full of the effective diameter region of cemented lens and adjacent thereto
A part.
Finally, the purple across lens is utilized to lens lighting ultraviolet light from the outside of the first lens 14 or the second lens 15
Outside line makes bonding agent PT cure, to engage the first lens 14 with the second lens 15.
Cemented lens according to the present embodiment, it is saturating in the region of the first lens 14 engaged with the second lens 15 and second
Vapor deposition has transparent material layer PM1, PM2 of single layer in the region of mirror 15 engaged with the first lens 14, transparent material layer PM1,
PM2 is by being selected from SiO2、BaF2、S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3, OM-4 material constitute, therefore, though carry out
The surface generation oxidation of the first lens and the second lens before bonding or weatherability are rotten etc., in the first lens 14 and the second lens
When the bonding agent PT solidifications that coating adhesive PT and making is coated between the first lens 14 and the second lens 15 between 15, bonding agent
PT is not easy to remove from transparent material layer PM1, PM2, is not easy due to the stripping of bonding agent PT in the first lens 14 and the second lens 15
Between generate unnecessary air layer, also, due to SiO2、BaF2、S4F、S5F、YF3、LaF3、CeF3、NdF3、Al2O3、OM-4
Refractive index >=1.4 and≤1.7, it is close with the refractive index of the first lens 14, the second lens 15 and bonding agent PT, therefore, help
In avoid because transparent material layer PM1, PM2 there are due to cause it is unnecessary reflection etc., and help avoid refraction the problems such as.
Particularly, cemented lens according to the present embodiment is made in the PC AD5503 manufactured using TEIJIN companies
First lens 14 and using the E48R of ZEONEX companies manufacture come in the case of making the second lens 15, by the first lens 14
The region engaged with the second lens 15 and the second lens 15 the region engaged with the first lens 14 in vapor deposition single layer by
SiO2Transparent material layer PM1, PM2 of composition, it is saturating with not in the region of the first lens 14 engaged with the second lens 15 and second
Compared with the case where transparent material layer is deposited in the region of mirror 15 engaged with the first lens 14, bonding agent can be confirmed in the first lens
At 14 concavity lens face 141 (and its neighboring area) and the convex lens face 151 (and its neighboring area) of the second lens 15
Adhesive strength is significantly strengthened.Specifically, the bonding agent compatibility between transparent material layer in the uncured state
It is good, seldom there is the phenomenon that bonding agent does not stick, in the concavity lens face 141 of the first lens 14 and the convex of the second lens 15
In the range of lens face 151, there is not the stripping of bonding agent, in the range of first area 144 and second area 154, hair
The case where raw stripping, drops to 0.1% from original 30%.Also, using by SiO2When the transparent material layer of composition, due to
SiO2It is that seldom will appear the stabilizing material of weatherability variation, therefore SiO has been deposited2Joint surface be less prone to oxidation, weatherability
It is deteriorated, the state that bonding agent is not removed can be stably kept, and due to SiO2Price is low, therefore using by SiO2What is constituted is saturating
Reduction manufacturing cost is additionally aided when bright material layer.
In addition, cemented lens according to the present embodiment, by being steamed on concavity lens face 141 and convex lens face 151
Transparent material layer is plated, helps avoid generating air in the effective diameter region of cemented lens due to the stripping of bonding agent PT
Layer.
In addition, cemented lens according to the present embodiment, is formed with recessed to surround in the first lens side outer region 142
The recess portion 143 of the mode of shape lens face 141 circumferentially, protrusion 153 is than 143 outer side of recess portion, therefore, during fabrication,
Even if being coated with more bonding agent PT in the concavity lens face 141 of the first lens 14, in the concavity lens for making the first lens 14
The convex lens face 151 of face 141 and the second lens 15 is close and makes in the second lens side outer region 152 of the second lens 15
Bonding agent PT is extruded and from concavity lens face when protrusion 153 is abutted with the first lens side outer region 142 of the first lens 14
141, convex lens face 151 is extended towards peripheral side, and the bonding agent PT extended towards peripheral side can also be stored by recess portion 143, no
Therefore the outside for easily leaking to the first lens 14 and the second lens 15 is not easy because leaking to the first lens 14 and the second lens 15
External bonding agent and cause to lead to the problem of when cemented lens is assembled in other components.
In addition, cemented lens according to the present embodiment, by above-mentioned first area 144 and the vapor deposition of second area 154
Transparent material layer is helped avoid generating the stripping of bonding agent in first area 144 and second area 154, be avoided because first
The bonding agent stripping generated in region 144 and second area 154 is spread between concavity lens face 141 and convex lens face 151
And seriously affect the optical property of cemented lens.
In addition, cemented lens according to the present embodiment, the interval between concavity lens face 141 and convex lens face 151
>=1 μm and≤20 μm, therefore, be filled in contributing to bonding agent exhaustive concavity lens face 141 and convex lens face 151 it
Between.
In addition, cemented lens according to the present embodiment, the μ of interval between first area 144 and second area 154 >=20
M and≤50 μm, therefore, help avoid the burr generated in the molding of the first lens 14 (the second lens 15) make first thoroughly
Mirror 14 and the second lens 15 close to when contacted with the second lens 15 (the first lens 14) and damage 15 (the first lens of the second lens
14) it, generates clast and influences the optical property etc. of cemented lens.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the specific implementation of the utility model is not
It is limited by the above embodiment.
For example, in the above-described embodiment, lens unit includes five lens arranged along optical axis direction, but is not limited to
In this, the quantity of lens can be adjusted suitably as needed, also, the form of lens unit each lens for including also can be as needed
Appropriate adjustment.
In addition, in the above-described embodiment, being formed in the first lens side outer region 142 to surround concavity lens face
The recess portion 143 of 141 mode circumferentially, however, it is not limited to this, according to circumstances, can also omit recess portion 143.
In addition, in the above-described embodiment, being formed in the second lens side outer region 152 towards outside the first lens side
All regions 142 protrude and the protrusion 153 that is abutted with the first lens side outer region 142, and however, it is not limited to this, also can be the
In one lens side outer region 142 formed towards the second lens side outer region 152 protrude and with the second lens side perimeter region
The protrusion that domain 152 abuts replaces raised part 153.Certainly, according to circumstances, raised part can also be omitted.
In addition, in the above-described embodiment, in the concavity lens face 141 of the first lens 14 and from the concavity lens face
141 have transparent material layer PM1 to vapor deposition in the region of the substantially half of recess portion 143, and in the convex lens face of the second lens 15
151 and in from the convex lens face 151 to region corresponding with the substantially half of recess portion 143 vapor deposition have transparent material layer PM2,
However, it is not limited to this, and the vapor deposition range of transparent material layer can be adjusted suitably as needed, for example, also can be only in the first lens 14
Concavity lens face 141 (and/or convex lens face 151 of the second lens 15) on be deposited transparent material layer, or thoroughly first
The concavity lens face 141 of mirror 14 and first area 144 (and/or the convex lens face 151 and second area of the second lens 15
154) transparent material layer is deposited.
Claims (7)
1. a kind of cemented lens has plastic first lens using bonding agent engagement and plastic second lens, institute
State the first lens, refractive index >=1.4 of second lens and the bonding agent and≤1.7, which is characterized in that
The region of first lens engaged with second lens includes concavity lens face and will be described recessed in peripheral side
The first lens side outer region that shape lens face surrounds,
Second lens include convex lens opposite with the concavity lens face with the region of first lens engagement
Face and the second lens side outer region for surrounding the convex lens face in peripheral side,
In the region of first lens engaged with second lens and/or second lens and first lens
Vapor deposition has the transparent material layer of single layer in the region of engagement, and the transparent material layer is by being selected from SiO2、BaF2、S4F、S5F、YF3、
LaF3、CeF3、NdF3、Al2O3, OM-4 material constitute.
2. cemented lens as described in claim 1, which is characterized in that
Vapor deposition has the transparent material layer on the concavity lens face and/or the convex lens face.
3. cemented lens as described in claim 1, which is characterized in that
A side in first lens side outer region and second lens side outer region is formed with towards another party
Protrusion that is prominent and being abutted with the another party.
4. cemented lens as claimed in claim 3, which is characterized in that
Circumferentially recessed is formed in a manner of surrounding the concavity lens face in the outer region of first lens side
Portion,
Protrusion side more outer than the recess portion.
5. cemented lens as claimed in claim 4, which is characterized in that
The recess portion is detached with the concavity lens face,
In first lens side first area between the recess portion and the concavity lens face of outer region and/or
Vapor deposition has the transparent material layer in the second area corresponding with the first area of second lens side outer region.
6. cemented lens as described in claim 1, which is characterized in that
Interval >=1 μm between the concavity lens face and the convex lens face and≤20 μm.
7. cemented lens as claimed in claim 5, which is characterized in that
Interval >=20 μm between the first area and the second area and≤50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820473954.8U CN208026968U (en) | 2018-03-30 | 2018-03-30 | Cemented lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820473954.8U CN208026968U (en) | 2018-03-30 | 2018-03-30 | Cemented lens |
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| Publication Number | Publication Date |
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| CN208026968U true CN208026968U (en) | 2018-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820473954.8U Active CN208026968U (en) | 2018-03-30 | 2018-03-30 | Cemented lens |
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| CN (1) | CN208026968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320626A (en) * | 2018-03-30 | 2019-10-11 | 日本电产三协（东莞）工机有限公司 | Cemented lens |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320626A (en) * | 2018-03-30 | 2019-10-11 | 日本电产三协（东莞）工机有限公司 | Cemented lens |
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