Junction lens device, zoom lens optical system employing same, and camera employing the zoom lens optical system
AssigneeSamsung Electronics Co., Ltd.
InventorJin-Oh Yang
Life of this patent
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Abstract
A junction lens device is made by joining a high refractive lens and a low refractive lens using an adhesive. A coating layer for index matching is formed on a surface of at least one of the high refractive lens and the low refractive lens contacting the adhesive to reduce a reflection ratio on a junction surface. The coating layer is formed such that a reflection ratio on the junction surface with respect to a visible light ray is not more than about 0.2%.
Claims19
A junction lens device made by joining a first lens having a first refractive index and a second lens having a second refractive index using an adhesive having a third refractive index that is closer to the second refractive index than the first refractive index,
- wherein a coating layer having an index of refraction between the first refractive index and the third refractive index is formed on a surface of the first lens and wherein the adhesive is disposed between the coating layer and the second lens to reduce a reflection ratio on a junction surface.
A zoom lens optical system including at least one junction lens device made by joining a first lens having a first refractive index and a second lens having a second refractive index using an adhesive having a third refractive index that is closer to the second refractive index than the first refractive index,
- wherein in the junction lens device a coating layer having an index of refraction between the first refractive index and the third refractive index is formed on a surface of the first lens and wherein the adhesive is disposed between the coating layer and the second lens to reduce a reflection ratio on a junction surface.
A zoom lens optical system including at least one junction lens device made by joining a first lens having a first refractive index and a second lens having a second refractive index using an adhesive having a third refractive index that is closer to the second refractive index than the first refractive index,
- wherein in the junction lens device a coating layer having an index of refraction between the first refractive index and the third refractive index is formed on a surface of the first lens and wherein the adhesive is disposed between the coating layer and the second lens so that a reflection ratio on a junction surface with respect to a visible light ray is not more than about 0.2%;
- wherein a difference in refractive index between the first refractive index and the second refractive index is not less than about 0.15.
A camera including a zoom lens optical system, wherein the zoom lens optical system comprises at least one junction lens device made by joining a first lens having a first refractive index and a second lens having a second refractive index using an adhesive having a third refractive index that is closer to the second refractive index than the first refractive index and, in the junction lens device, a coating layer having an index of refraction between the first refractive index and the third refractive index is formed on a surface of the first lens and wherein the adhesive is disposed between the coating layer and the second lens to reduce a reflection ratio on a junction surface.
A camera including a zoom lens optical system, wherein the zoom lens optical system comprises at least one junction lens device made by joining a first lens having a first refractive index and a second lens having a second refractive index using an adhesive having a third refractive index that is closer to the second refractive index than the first refractive index and, in the junction lens device, a coating layer having an index of refraction between the first refractive index and the third refractive index is formed on a surface of the first lens and wherein the adhesive is disposed between the coating layer and the second lens so that a reflection ratio on a junction surface with respect to a visible light ray is not more than about 0.2%;
- wherein a difference in refractive index between the first refractive index and the second refractive index is not less than about 0.15.
A method of manufacturing a junction lens device comprising the steps of:
- forming a coating layer on a first lens having a first refractive index;
- and
- joining said first lens to a second lens having a second refractive index with an adhesive disposed between said coating layer and said second lens;
- wherein said adhesive has a refractive index closer to the second refractive index than said first refractive index, and said coating layer has a refractive index between the first refractive index and the refractive index of the adhesive.
Dependencies are inferred from the claim text.