Patent ID: 8699142
Filing Date: 2014-04-15
Classification: G02B

Abstract:
1. A variable focus lens with a changeable refractive power, the variable focus lens comprising: first liquid, second liquid, and third liquid, wherein the first liquid and the second liquid have refractive indices that differ from each other, and wherein the second liquid and the third liquid have refractive indices that differ from each other; a first interface defined between the first liquid and the second liquid; a second interface defined between the second liquid and the third liquid; and a middle layer composed of the second liquid having a meniscus shape between the first interface and the second interface, wherein shapes of the first interface and the second interface are each changeable to change the refractive power of the variable focus lens, and so that a sign of the refractive power of the first interface and a sign of the refractive power of the second interface differ from each other, wherein the refractive index of the second liquid is the lowest of the refractive indices among the first liquid, the second liquid, and the third liquid, wherein for the first liquid, the second liquid, and the third liquid, the refractive indices of the C line are denoted n wherein when the differences in dispersion are respectively |L