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RU97117463A - LENS LENS AND OPTICAL SENSOR DEVICE WITH LENS LENS - Google Patents

LENS LENS AND OPTICAL SENSOR DEVICE WITH LENS LENS

Info

Publication number
RU97117463A
RU97117463A RU97117463/28A RU97117463A RU97117463A RU 97117463 A RU97117463 A RU 97117463A RU 97117463/28 A RU97117463/28 A RU 97117463/28A RU 97117463 A RU97117463 A RU 97117463A RU 97117463 A RU97117463 A RU 97117463A
Authority
RU
Russia
Prior art keywords
lens
optical
optical glass
numerical aperture
satisfies
Prior art date
Application number
RU97117463/28A
Other languages
Russian (ru)
Other versions
RU2202813C2 (en
Inventor
Ямамото Кендзи
Итимура Исао
Маеда Фумисада
Ватанабе Тосио
Охсато Киеси
Original Assignee
Сони Корпорейшн
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP28275096A external-priority patent/JP3932578B2/en
Application filed by Сони Корпорейшн filed Critical Сони Корпорейшн
Publication of RU97117463A publication Critical patent/RU97117463A/en
Application granted granted Critical
Publication of RU2202813C2 publication Critical patent/RU2202813C2/en

Links

Claims (8)

1. Линза объектива, имеющая по меньшей мере два линзовых элемента, изготовленных из оптического стекла, отличающаяся тем, что линзовые элементы имеют число Аббе равное 40 или более на d-линии, в которой по меньшей мере каждая поверхность выполнена в виде асферической поверхности и числовая апертура составляет 0,7 или более.1. The lens of the lens having at least two lens elements made of optical glass, characterized in that the lens elements have an Abbe number of 40 or more on the d-line, in which at least each surface is made in the form of an aspherical surface and numerical the aperture is 0.7 or more. 2. Линза объектива по п. 1, отличающаяся тем, что число Аббе оптического стекла, из которого изготовлены двухлинзовые элементы на d-линии, равно 60 или более и числовая апертура составляет 0,8 или более. 2. The lens of claim 1, wherein the Abbe number of the optical glass of which the two-lens elements are made on the d-line is 60 or more and the numerical aperture is 0.8 or more. 3. Линза объектива по п. 1, отличающаяся тем, что коэффициент преломления оптического стекла, из которого изготовлен каждый элемент линзы, в котором угол, образованный между тангенциальной плоскостью плоскости в периферии линзового элемента и плоскостью, перпендикулярной к оптической оси, больше, чем угол другого линзового элемента, составляет n1 и коэффициент преломления оптического стекла, из которого изготовлен другой линзовый элемент, составляет n2, удовлетворяет следующему соотношению:
n1 > n2.3. The lens of claim 1, wherein the refractive index of the optical glass of which each lens element is made, in which the angle formed between the tangential plane of the plane in the periphery of the lens element and the plane perpendicular to the optical axis is greater than the angle of another lens element is n 1 and the refractive index of the optical glass of which the other lens element is made is n 2 , satisfies the following relation:
n 1 > n 2 . 4. Линза объектива по п.1, отличающаяся тем, что диаметр падающего лазерного луча составляет BW, рабочее расстояние - WD и числовая апертура - NA удовлетворяет следующим соотношениям: если 1,0 ≤ BW < 4,5, 0,05 ≤ WD и 0,7 ≤ NA < 0,8, то WD ≤ 0,25676BW + 0,039189, если 0,8 ≤ NA < 0,9, то WD ≤ 0,14054BW - 0,064865, и если 0,9 ≤ NA, то WD ≤ 0,096429BW - 0,244640. 4. The objective lens according to claim 1, characterized in that the diameter of the incident laser beam is BW, the working distance is WD and the numerical aperture is NA satisfies the following relationships: if 1.0 ≤ BW <4.5, 0.05 ≤ WD and 0.7 ≤ NA <0.8, then WD ≤ 0.25676BW + 0.039189, if 0.8 ≤ NA <0.9, then WD ≤ 0.14054BW - 0.064865, and if 0.9 ≤ NA , then WD ≤ 0.096429BW - 0.244640. 5. Линза объектива по п.1, отличающаяся тем, что отношение F1/F фокусного расстояния F1 линзы, которая расположена на стороне, на которую падает лазерный луч, и фокусное расстояние F всей системы линзы удовлетворяет следующему соотношению: 1,7 < (F1/F) < 2,5.5. The lens of claim 1, characterized in that the ratio F 1 / F of the focal length F 1 of the lens, which is located on the side on which the laser beam falls, and the focal length F of the entire lens system satisfies the following ratio: 1.7 < (F 1 / F) <2.5. 6. Линза объектива по п.1, отличающаяся тем, что аберрацию упомянутой линзы объектива корректируют, чтобы соответствовать толщине Т прозрачной подложки оптической записывающей среды, которая расположена на поверхности записи сигнала и поддерживает упомянутую поверхность записи сигнала, удовлетворяет следующим соотношениям: если 0,7 ≤ NA (числовая апертура) < 0,8, то Т ≤ 0,32 мм, если 0,8 ≤ NA < 0,9, то Т ≤ 0,20 мм, и если 0,9 ≤ NA, то Т ≤ 0,11 мм. 6. The objective lens according to claim 1, characterized in that the aberration of said objective lens is corrected to correspond to the thickness T of the transparent substrate of the optical recording medium, which is located on the signal recording surface and supports said signal recording surface, satisfies the following relations: if 0.7 ≤ NA (numerical aperture) <0.8, then T ≤ 0.32 mm, if 0.8 ≤ NA <0.9, then T ≤ 0.20 mm, and if 0.9 ≤ NA, then T ≤ 0 11 mm. 7. Устройство оптического датчика, включающее источник света и линзу объектива, предназначенную для сведения в одну точку лазерного луча, излучаемого источником света на поверхность записи сигнала оптической записывающей среды, отличающееся тем, что упомянутая линза имеет по меньшей мере два линзовых элемента, изготовленных из оптического стекла с числом Аббе равным 40 или более на d-линии, по меньшей мере, каждая поверхность выполнена в виде асферической поверхности и числовая апертура составляет 0,7 или более. 7. An optical sensor device comprising a light source and an objective lens, designed to bring into one point a laser beam emitted by a light source onto a recording surface of an optical recording medium signal, characterized in that said lens has at least two lens elements made of optical glass with an Abbe number of 40 or more on the d-line, at least each surface is made in the form of an aspherical surface and the numerical aperture is 0.7 or more. 8. Устройство оптического датчика по п.7, отличающееся тем, что число Аббе оптического стекла, из которого изготовлены два линзовых элемента на d-линии, равно 60 или более и числовая апертура составляет 0,8 или более. 8. The optical sensor device according to claim 7, characterized in that the Abbe number of the optical glass of which two lens elements are made on the d-line is 60 or more and the numerical aperture is 0.8 or more.
RU97117463/28A 1996-10-24 1997-10-23 Objective lens and mechanical design of optical sensor incorporating objective lens RU2202813C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP28275096A JP3932578B2 (en) 1996-10-24 1996-10-24 Objective lens and optical pickup device
JPPO8-282750 1996-10-24

Publications (2)

Publication Number Publication Date
RU97117463A true RU97117463A (en) 1999-07-20
RU2202813C2 RU2202813C2 (en) 2003-04-20

Family

ID=17656577

Family Applications (1)

Application Number Title Priority Date Filing Date
RU97117463/28A RU2202813C2 (en) 1996-10-24 1997-10-23 Objective lens and mechanical design of optical sensor incorporating objective lens

Country Status (15)

Country Link
US (1) US6058095A (en)
EP (1) EP0840156B1 (en)
JP (1) JP3932578B2 (en)
KR (1) KR100527069B1 (en)
CN (1) CN1134675C (en)
AT (1) ATE336735T1 (en)
AU (1) AU723455B2 (en)
CA (1) CA2218675A1 (en)
DE (1) DE69736507T2 (en)
ES (1) ES2267124T3 (en)
ID (1) ID18705A (en)
MY (1) MY119398A (en)
PL (1) PL185067B1 (en)
RU (1) RU2202813C2 (en)
TW (1) TW345620B (en)

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