JPS56138704A - Spherical lens - Google Patents

Spherical lens

Info

Publication number
JPS56138704A
JPS56138704A JP4234880A JP4234880A JPS56138704A JP S56138704 A JPS56138704 A JP S56138704A JP 4234880 A JP4234880 A JP 4234880A JP 4234880 A JP4234880 A JP 4234880A JP S56138704 A JPS56138704 A JP S56138704A
Authority
JP
Japan
Prior art keywords
clad
ball
refractive index
coefft
setting
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP4234880A
Other languages
Japanese (ja)
Inventor
Keisuke Kikuchi
Takitaro Morikawa
Junichi Shimada
Kenjiro Sakurai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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
Application filed by Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP4234880A priority Critical patent/JPS56138704A/en
Priority to US06/244,915 priority patent/US4422733A/en
Publication of JPS56138704A publication Critical patent/JPS56138704A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0087—Simple or compound lenses with index gradient

Abstract

PURPOSE:To make possible high degrees of aberration correction with simple constitution by sticking clad on the outside circumference of a heterogeneous refractive index ball. CONSTITUTION:Clad 2 of a refractive index nd is stuck on the outside circumference of a ball 1 having a heterogeneous refractive index n(0), by an ion exchange method, a melt-sticking method utilizing surface tension of medium, etc. In the case of utilizing this as an imaging lens, a transverse aberration is corrected to + or -0.5mum when numerical aperture (NA) is 0.2, where n(0)=1.6, nd=1.6, G2 (secondary coefft.)=-0.1, G4 (quaternary coefft.)=0.024 and the ratio of the thickness (d) of the clad 2 to the radius r0 of the ball 1 is assumed to be 0.78. When this is used for Fourier transformation, the similar correction is made at NA=0.4 by setting n(0), nd, G2 at the same values as mentioned above and setting G4=0.04, d/r0= 0.56. Hence, aberration correction of high degree is made with the simple constitution.
JP4234880A 1980-03-31 1980-03-31 Spherical lens Pending JPS56138704A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4234880A JPS56138704A (en) 1980-03-31 1980-03-31 Spherical lens
US06/244,915 US4422733A (en) 1980-03-31 1981-03-18 Cladded spherical lens having uneven refractive index

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4234880A JPS56138704A (en) 1980-03-31 1980-03-31 Spherical lens

Publications (1)

Publication Number Publication Date
JPS56138704A true JPS56138704A (en) 1981-10-29

Family

ID=12633517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4234880A Pending JPS56138704A (en) 1980-03-31 1980-03-31 Spherical lens

Country Status (1)

Country Link
JP (1) JPS56138704A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052813A (en) * 1983-09-02 1985-03-26 Canon Inc Formation of light source using distributed index lens and light source device
JPS6323118A (en) * 1986-03-25 1988-01-30 Canon Inc Distributed index lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052813A (en) * 1983-09-02 1985-03-26 Canon Inc Formation of light source using distributed index lens and light source device
JPS6323118A (en) * 1986-03-25 1988-01-30 Canon Inc Distributed index lens

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