Objective lens,optical device and optical information system
A technology of optical system and objective lens, applied in the direction of beam guiding device, optics, information storage, etc., which can solve the problems of impossible alignment and low microscope magnification
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no. 1 example
[0247] Figure 4A It is a combination diagram of the imaging optical system with the compound objective lens according to the first embodiment of the present invention, and a beam of transmitted light without diffraction converges on the thin information medium. Figure 4B yes Figure 4A The combination diagram of the imaging optical system shown in , a beam of first-order diffracted light converges on a thick information medium. Figure 5 yes Figure 4A , 4B A plan view of the hologram lens shown in , drawing the grating pattern of the hologram lens.
[0248] Such as Figure 4A , 4B Shown in, one is used to condense light on the first substrate 22 of thin-type first information medium 23 (thickness T1) or on the second substrate 24 of thick-type second information medium 25 (thickness T2) to form diffraction receiving The imaging optical system 21 that limits the spot of light, includes a part of the incident light L3 emitted from the light source without any diffraction to...
no. 2 example
[0287] Figure 10A It is a combination diagram of an imaging optical system with a compound objective lens according to a second embodiment of the present invention, a bundle of non-diffracting transmitted light converges on a thin information medium. Figure 10B yes Figure 10A The combination diagram of the imaging optical system shown in , a beam of first-order diffracted light converges on the thick information medium.
[0288] Such as Figure 10A , 10B As shown in, one is used to condense the light on the first substrate 22 of the first information medium 23 (thickness T1) or on the second substrate 24 of the second information medium 25 (thickness T2) so as to form diffraction limited light concentration The imaging optical system 31 of the point comprises a blazed hologram lens used to transmit a part of the incident light without any diffraction to form a beam of transmitted light L4 and diffract the rest of the incident light L3 to form a beam of first-order diffra...
no. 3 example
[0306] Figure 16A It is a combination diagram of an imaging optical system with a composite objective lens according to a third embodiment of the present invention, where a beam of first-order diffracted light converges on a thin information medium. Figure 16B yes Figure 16A Combination diagram of the imaging optical system shown in , a beam of non-diffraction transmitted light converges on the thick information medium.
[0307] Such as Figure 16A , 16B Shown in, is used for converging light on the first substrate 22 of the first information medium 23 (thickness T1) or on the second substrate 24 of the second information medium 25 (thickness T2) to form the diffraction limited spot The imaging optical system 41 includes a blazed hologram lens 42 for transmitting a part of the incident light L3 without any diffraction to form a beam of transmitted light L4 and diffracting the remainder of the incident light L3 to form a beam of first-order diffracted light L6, And an ob...
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Abstract
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