For example, a triazine ring-containing polymer containing a repeating unit structure represented by Formula (24) below,

##STR00001## wherein R.sup.102 represents a crosslinking group.

For example, a triazine ring-containing polymer containing a repeating unit structure represented by Formula (24) below,

##STR00001## wherein R.sup.102 represents a crosslinking group.

The purpose of the present invention is to provide a polyester resin or polyester carbonate resin, which has high refractive index, while achieving an excellent balance between heat resistance and low birefringence. A polyester resin or a polyester carbonate resin, which contains repeating units represented by the following formulae (1) and (2), and wherein the ratio of the repeating unit represented by formula (1) to the repeating unit represented by formula (2) is 15:85 to 85:15. (In formula (1), each of rings Z.sup.1 and Z.sup.2 represents a polycyclic aromatic hydrocarbon group having 9-20 carbon atoms; each of R.sup.1, R.sup.2, R.sup.7 and R.sup.8 independently represents a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.3-R.sup.6 and R.sup.9-R.sup.16 represents a hydrogen atom or an aliphatic or aromatic substituents; each of j, k, r and s independently represent an integer of 0 or more; and each of m, n, p and q independently represents 1 or 2) (In formula (2), each of R.sup.7, R.sup.8, R.sup.17 and R.sup.18 independently represent a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.9-R.sup.16 and R.sup.19-R.sup.26 represents a hydrogen atoms or an aliphatic or aromatic substituents; and each of r, s, t and u independently represents an integer of 0 or more.)

The purpose of the present invention is to provide a polyester resin or polyester carbonate resin, which has high refractive index, while achieving an excellent balance between heat resistance and low birefringence. A polyester resin or a polyester carbonate resin, which contains repeating units represented by the following formulae (1) and (2), and wherein the ratio of the repeating unit represented by formula (1) to the repeating unit represented by formula (2) is 15:85 to 85:15. (In formula (1), each of rings Z.sup.1 and Z.sup.2 represents a polycyclic aromatic hydrocarbon group having 9-20 carbon atoms; each of R.sup.1, R.sup.2, R.sup.7 and R.sup.8 independently represents a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.3-R.sup.6 and R.sup.9-R.sup.16 represents a hydrogen atom or an aliphatic or aromatic substituents; each of j, k, r and s independently represent an integer of 0 or more; and each of m, n, p and q independently represents 1 or 2) (In formula (2), each of R.sup.7, R.sup.8, R.sup.17 and R.sup.18 independently represent a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R.sup.9-R.sup.16 and R.sup.19-R.sup.26 represents a hydrogen atoms or an aliphatic or aromatic substituents; and each of r, s, t and u independently represents an integer of 0 or more.)

The present invention relates to the field of optical lenses and provides a camera optical lens sequentially including, from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens; a fifth lens; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. The camera optical lens satisfies following conditions: 2.80≤v1/v2≤4.50; and −10.00≤f3/f≤−3.00, where f denotes a focal length of the camera optical lens; f3 denotes a focal length of the third lens; and v1 and v2 denote abbe numbers of the first and second lenses, respectively. The camera optical lens according to the present invention can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

Provided is a compound represented by General Formula (1)

##STR00001##

in General Formula (1), Ar.sub.1 and Ar.sub.2 independently represent a group selected from the following Formulae,

##STR00002##

Provided is a compound represented by General Formula (1)

##STR00001##

in General Formula (1), Ar.sub.1 and Ar.sub.2 independently represent a group selected from the following Formulae,

##STR00002##

A polymerizable composition for an optical material according to the present invention includes a photochromic composition (A), and a polymerizable composition (B) including a bi- or higher functional iso(thio)cyanate compound and a bi- or higher functional active hydrogen compound, in which the photochromic composition (A) is a composition including at least three types of photochromic compounds (i) to (iii), the photochromic compound (i) has a structure including a chromophore a and a monovalent or a divalent organic group including one or more types of a polysiloxane chain or a polyoxyalkylene chain, the photochromic compound (ii) has the chromophore a (which is not the photochromic compound (i)), and the photochromic compound (iii) has a chromophore b different from the chromophore a.

A polymerizable composition for an optical material according to the present invention includes a photochromic composition (A), and a polymerizable composition (B) including a bi- or higher functional iso(thio)cyanate compound and a bi- or higher functional active hydrogen compound, in which the photochromic composition (A) is a composition including at least three types of photochromic compounds (i) to (iii), the photochromic compound (i) has a structure including a chromophore a and a monovalent or a divalent organic group including one or more types of a polysiloxane chain or a polyoxyalkylene chain, the photochromic compound (ii) has the chromophore a (which is not the photochromic compound (i)), and the photochromic compound (iii) has a chromophore b different from the chromophore a.

The photochromic composition contains one or more compounds represented by General Formula A, one or more compounds represented by General Formula B, and one or more compounds represented by General Formula C is provided. In General Formula A, R.sup.1 to R.sup.6, B.sup.1, and B.sup.2 each independently represent a hydrogen atom or a substituent. In General Formula B, R.sup.7 to R.sup.12, B.sup.3, and B.sup.4 each independently represent a hydrogen atom or a substituent, and R.sup.13 and R.sup.14 each independently represent an electron-donating group. In General Formula C, R.sup.15 to R.sup.20, B.sup.5, and B.sup.6 each independently represent a hydrogen atom or a substituent, and one of R.sup.21 and R.sup.22 represents a hydrogen atom and the other represents an electron-donating group.

##STR00001##