Thermoplastic resin and optical member
US-11261294-B2 · Mar 1, 2022 · US
Optical lens
US12240944B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12240944-B2 |
| Application number | US-202017434138-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 26, 2020 |
| Priority date | Aug 30, 2017 |
| Publication date | Mar 4, 2025 |
| Grant date | Mar 4, 2025 |
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- Title
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Abstract
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The invention provides an optical lens that can provide small-sized imaging modules. The optical lens of the invention comprises a thermoplastic resin having a refractive index (nD) and Abbe number (ν) satisfying the following mathematical formula (A): nD ≤−0.02×ν+2.040 (A) (where 1.660<nD).
First claim
Opening claim text (preview).
The invention claimed is: 1. An optical lens comprising a thermoplastic resin, wherein the thermoplastic resin contains a repeating unit represented by the following formula (1): wherein rings Z represent the same or different aromatic hydrocarbon rings, R 1 and R 2 each independently represent a hydrogen atom, a halogen atom or a hydrocarbon group of 1 to 12 carbon atoms optionally containing an aromatic group, Ar 1 and Ar 2 each represent an aromatic group optionally containing a substituent, L 1 and L 2 each independently represent a divalent linking group, j and k each independently represent an integer of 0 or greater, m and n each independently represent 0 or 1, and W is at least one group selected from groups represented by the following formula (2) or (3), wherein X represents a divalent linking group, wherein the thermoplastic resin has a b* value according to the CIE1976 (L*a*b*) color system of 10.0 or lower, as measured using a 13 mass % solution in methylene chloride (a solution of 1.0 g dissolved in 5 ml of methylene chloride), and has a refractive index (nD) and Abbe number (ν) satisfying the following mathematical formula (A): nD≤− 0.02×ν+2.040 (A) (where 1.660<nD). 2. The optical lens according to claim 1 , wherein the thermoplastic resin has a refractive index (nD) and Abbe number (ν) satisfying the following mathematical formula (B): nD≥− 0.02×ν+1.960 (B) 3. The optical lens according to claim 1 , wherein a specific viscosity of the thermoplastic resin is 0.12 to 0.40. 4. The optical lens according to claim 1 , wherein the glass transition temperature of the thermoplastic resin is 130 to 170° C. 5. The optical lens according to claim 1 , wherein the thermoplastic resin is a polyester, polyester carbonate or polycarbonate. 6. The optical lens according to claim 1 , wherein the amount of residual palladium in the thermoplastic resin is 10 ppm or lower.
Assignees
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Classifications
containing atoms other than carbon, hydrogen or oxygen · CPC title
Aromatic polycarbonates · CPC title
having at least one aspherical surface · CPC title
use in electrical or conductive gadgets · CPC title
Transparent films; Clear coatings; Transparent materials · CPC title
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Frequently asked questions
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- What does patent US12240944B2 cover?
- The invention provides an optical lens that can provide small-sized imaging modules. The optical lens of the invention comprises a thermoplastic resin having a refractive index (nD) and Abbe number (ν) satisfying the following mathematical formula (A): nD ≤−0.02×ν+2.040 (A) (where 1.660<nD).
- Who is the assignee on this patent?
- Teijin Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B1/041. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 04 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).