JPS63154344A - Joining optical member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bonded optical member comprising a glass substrate and a transparent organic polymer layer formed on the surface of the glass substrate.

[Prior art] In the case of bonded optical elements such as bonded lenses and bonded prisms, the idea of forming a layer of organic polymer material on one or both surfaces of a glass substrate and using it as a single bonded optical element has been previously used. It was from. For example, the use of thermosetting resins such as epoxy resins and photopolymerizable adhesives such as N0A-60 or Photopond 12 (trade name) have been proposed, but these are both required for bonded optical elements. The conditions (small deformation during bonding, small change over time, suitable for mass production) could not be met. Recently, 3W5 has been developed by combining energy irradiation type resin with low curing shrinkage strain and energy curable resin with high weather resistance with glass base material.
JP-A-60-56 discloses the manufacturing of structurally bonded optical members.
It is disclosed in Japanese Patent No. 544.

MINOLTA TECNOREPORT is an example of applying the above cemented optical member to a single-lens reflex zoom lens.
No. 2 1985, pages 15 to 24.

[Problems to be Solved by the Invention] Although the bonded optical member manufactured by the above-mentioned conventional technique can be applied to a specific optical system, Since it is extremely difficult to set the same optical properties such as the refractive index 1 coloring state of the second layer resin, there are constraints on optical design, which makes it difficult to adapt to new optical systems. It had the following drawback.

The present invention has been made in view of the problems of the prior art described above, and has two main features: high durability and two
The object of the present invention is to provide a novel bonded optical member that has a large degree of freedom in optical design, which is the greatest feature of a layered structure, and can expand the range of application.

[Means and effects for solving the problems] The present invention provides a bonded optical material (bonded optical element) having a three-layer structure consisting of a glass base material and two resin layers formed on the glass base material. , the main components of the resin layer on the glass substrate side (first layer) and the resin layer on the outer surface side (second layer) are the same, and the type and amount of the reaction initiator are the same in the first and second layers. This is because the bonded optical material is formed differently from the conventional one. The main components of the first and second layers are:
It is a mixture of polyfunctional ester acrylate and polyfunctional urethane acrylate, and in the first layer, only the ultraviolet irradiation-initiated type is added as a reaction initiator, and in the second layer, the ultraviolet irradiation-initiated type is added as a reaction initiator and a thermal reaction is added as a reaction initiator. Both starting types are added to form each layer.

As a means for molding the first layer resin and the second layer resin on the glass substrate, first, the first layer resin is applied onto the glass substrate and cured by irradiating it with ultraviolet rays. In this case, in order to improve the adhesion between the glass substrate and the first layer resin, the surface of the glass substrate may be subjected to surface treatment such as coupling treatment.

The second layer resin is applied onto the cured first layer resin, formed into a desired shape using a mold, and cured by ultraviolet irradiation.

Thereafter, the second layer is further cured by heating to a temperature at which the heat-reactive initiator added to the second layer reacts. As a result, a new bonded optical member can be obtained in which the outer surface side, that is, the second layer resin is more durable than the first layer resin, and the range of application can be expanded.

[Example] Next, an example of the bonded optical member according to the present invention will be described.

The figure shows one embodiment of the present invention, and as shown in Figure 5, a bonded optical member l has a glass base material 2 and a glass base material 2.
A polymer layer 3 of a transparent organic polymer is formed.

The organic polymer layer 3 is formed of a first layer resin 3a forming the glass substrate 2 side and a second layer resin 3b forming the outer surface side. First layer resin 3a and second layer tree 113b
and the generation is set to be the same. As the main component, a bonding resin containing 60 parts by weight or more of polyfunctional arsenic ester acrylate and 10 parts by weight or more of polyfunctional urethane acrylate in total of 80 parts by weight or more is used.

As the polymerization initiator (reaction initiator) for the polymer raw material component of the first layer constituting the glass substrate 2 side, 1% by weight of an ultraviolet irradiation-initiated polymerization initiator was used, and the second layer constituting the outer surface side As a polymerization initiator (reaction initiator) for the polymer raw material component, 0
．． 7% by weight of an ultraviolet irradiation-initiated polymerization initiator and 0.3% by weight of a thermosetting polymerization initiator were used. Irgacure 184 (Ciba Geigy) was used as an ultraviolet irradiation-initiated polymerization initiator, and Perloyl IPP (NOF Corporation), Perbutyl I (NOF Corporation), etc. were used as thermosetting polymerization initiators.

A first layer resin 3a is applied to the glass substrate 2 and cured by ultraviolet irradiation, a second layer resin 3b is applied on the cured first layer resin 3a, molded, and then cured by ultraviolet irradiation, Furthermore, after that, the second layer resin 3b is further cured by heating to the reaction temperature of the thermosetting polymerization initiator attached to the second layer resin 3b, thereby obtaining the novel bonded optical member 1 according to the present example. .

When the characteristics of the optical member 1 of this example were measured, the results shown in the table below were obtained.

As shown in the table, there is almost no difference in optical properties between the first layer resin 3a and the second layer resin 3b, but the surface hardness is 1.
It can be seen that the layer resin 3a has higher resistance to damage and improved durability.

Therefore, according to this example, a novel bonded optical member l that has both high durability, which is the most important feature of a three-layer structure, and a large degree of freedom in optical design, which is the most important feature of a two-layer structure.
Therefore, the range of application of the bonded optical member can be greatly expanded.

[Effects of the Invention] As described above, according to the present invention, a bonded optical member having high durability and a large degree of freedom in optical design can be provided, and the range of application of the bonded optical member can be expanded. It is.

[Brief explanation of the drawing]

The figure is an explanatory view showing one embodiment of the bonded optical member according to the present invention. 2...Glass base material 3...Polymer layer 3a...1st layer resin 3b...2nd layer resin Patent applicant Olympus Optical Industry Co., Ltd. 2, Glass base material 3, Polymer layer 38. 1st layer resin 3b, 2nd layer resin procedural amendment (voluntary) December 23, 1985

Claims (2)

[Claims] (1) In a bonded optical member consisting of a glass substrate and a polymer layer of a transparent organic polymer formed on the surface of the glass substrate, the polymer layer of the organic polymer has the same main components. but,
A polymer raw material component part constituting the glass substrate side containing only an ultraviolet irradiation-initiated polymerization initiator as a polymerization initiator, and an ultraviolet irradiation-initiated polymerization initiator and a heat-initiated polymerization initiator as polymerization initiators. What is claimed is: 1. A bonded optical member comprising: a polymer raw material component portion constituting the outer surface side thereof, and a layer formed by reacting with each polymerization initiator. (2) The main component contains a total of 80 parts by weight or more of 60 parts by weight or more of polyfunctional ester acrylate and 10 parts by weight or more of polyfunctional urethane acrylate. bonded optical components.