An optical adhesive including a viscoelastic or elastomeric adhesive layer and a cured polymer layer immediately adjacent the viscoelastic or elastomeric adhesive layer is described. The viscoelastic or elastomeric adhesive layer a refractive index less than 1.570 and the cured polymer layer has a refractive index of at least 1.570. An interface between the viscoelastic or elastomeric adhesive layer and the cured polymer layer is structured. The cured polymer layer has a storage modulus of at least 2000 MPa at 20° C. and a glass transition temperature of no more than 65° C.

Provided is a resin composition that is highly fluid and has good moldability, and that has excellent optical properties. More specifically, provided is a resin composition that contains a thermoplastic resin and a specific compounding agent containing a naphthalene structure and/or a fluorene structure.

An optical film is provided in which a wavelength dispersion characteristic at a wavelength of 400 nm to 800 nm satisfies the following general formula (1):

[00001]$\begin{array}{cc}\frac{\Delta \lambda }{\Delta 550}=a{\lambda }^{-b}& \left(1\right)\end{array}$

wherein a has a value of 1500<a<6600, b has a value of 1.17<b<1.27, Δλ represents a photoelastic coefficient at an arbitrary wavelength λ nm in a range of 400 nm to 800 nm, and Δ550 represents a photoelastic coefficient at a wavelength of 550 nm and which has a thickness of 10 m to 1000 m, can be provided.

An optical film is provided in which a wavelength dispersion characteristic at a wavelength of 400 nm to 800 nm satisfies the following general formula (1):

[00001]$\begin{array}{cc}\frac{\Delta \lambda }{\Delta 550}=a{\lambda }^{-b}& \left(1\right)\end{array}$

wherein a has a value of 1500<a<6600, b has a value of 1.17<b<1.27, Δλ represents a photoelastic coefficient at an arbitrary wavelength λ nm in a range of 400 nm to 800 nm, and Δ550 represents a photoelastic coefficient at a wavelength of 550 nm and which has a thickness of 10 m to 1000 m, can be provided.

The present invention relates to a polysiloxane copolymer including a structural unit derived from a siloxane-based polymer and a structural unit derived from a silane-based monomer, and a method for preparing the same. The polysiloxane copolymer of the present invention has excellent heat resistance, flexibility, transparency, photosensitivity, durability and the like, and may be widely used as a material in an optical field or/and an electronic field.

The present invention relates to a polysiloxane copolymer including a structural unit derived from a siloxane-based polymer and a structural unit derived from a silane-based monomer, and a method for preparing the same. The polysiloxane copolymer of the present invention has excellent heat resistance, flexibility, transparency, photosensitivity, durability and the like, and may be widely used as a material in an optical field or/and an electronic field.

Provided are a cycloolefin polymer simultaneously having a high refractive index, a low Abbe number, and low birefringence and also a method of producing this cycloolefin polymer and an optical element in which this cycloolefin polymer is used. The cycloolefin polymer is a polymer, or hydrogenated product thereof, said polymer comprising a structural unit derived from a naphthyl group-containing alicyclic compound (A) represented by following formula (1), in a specific proportion. In formula (1), one of R.sub.2a to R.sub.5a is a naphthyl group and remaining groups among R.sub.2a to R.sub.5a and R.sub.1a are as defined in the specification.

##STR00001##

Provided are a cycloolefin polymer simultaneously having a high refractive index, a low Abbe number, and low birefringence and also a method of producing this cycloolefin polymer and an optical element in which this cycloolefin polymer is used. The cycloolefin polymer is a polymer, or hydrogenated product thereof, said polymer comprising a structural unit derived from a naphthyl group-containing alicyclic compound (A) represented by following formula (1), in a specific proportion. In formula (1), one of R.sub.2a to R.sub.5a is a naphthyl group and remaining groups among R.sub.2a to R.sub.5a and R.sub.1a are as defined in the specification.

##STR00001##

Provided are a cycloolefin polymer simultaneously having a high refractive index, a low Abbe number, and low birefringence and also a method of producing this cycloolefin polymer and an optical element in which this cycloolefin polymer is used. The cycloolefin polymer is a polymer, or hydrogenated product thereof, said polymer comprising a structural unit derived from a naphthyl group-containing alicyclic compound (A) represented by following formula (1), in a specific proportion. In formula (1), one of R.sub.2a to R.sub.5a is a naphthyl group and remaining groups among R.sub.2a to R.sub.5a and R.sub.1a are as defined in the specification.

##STR00001##

The invention is to provide an ophthalmic lens and manufacturing method thereof. The ophthalmic lens comprises a lens body, a polydopamine layer formed on a surface of the lens body and a first cellulose nanofiber (CNF) layer bonded to the polydopamine layer.