Beam shaping optical device, optical head, and optical information medium drive device

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	Beam shaping optical device, optical head, and optical information medium drive device
其他题名	Beam shaping optical device, optical head, and optical information medium drive device
	MORI, EISHIN; MATSUZAKI, KEIICHI,; WADA, HIDENORI; HAYASHI, HIDEKI
	2006-05-31
专利权人	PANASONIC CORPORATION
公开日期	2006-05-31
授权国家	欧洲专利局
专利类型	发明申请
摘要	An object of the present invention is to suppress the deterioration of a collimation quality resulting from a temperature change. A lens surface of a collimating lens 2 closer to a light source 20 is in contact with a retracted surface 3a at one end surface of a barrel 3. On a projecting surface at an outer side of the one end surface of the barrel 3, grooves 11 are formed at a plurality of positions symmetric with respect to an optical axis O. An adhesive 15 depositing in the grooves 11 are applied to the outer circumferential surface of the collimating lens 2 to fix the collimating lens 2 in the barrel 3. Since the grooves 11 are formed to be shallower than the retracted surface 3a, the adhesive 15 does not intrude onto the retracted surface 3a. The barrel 3 is pressed against a wall surface formed in the inner circumferential surface of a barrel holder main portion 5 and having a V-shaped cross section by a leaf spring 13, thereby being held at a specified position in the barrel holder main portion 5. An amount of change ΔL in distance from a reference surface to a held position of the collimating lens 2 per unit temperature is set to conform to a sum of an amount of change Δt in the movement of the light source 20 from the reference position per unit temperature and an amount of change Δf of the back focus of the collimating lens 2 per unit temperature.
其他摘要	本发明的目的是抑制由温度变化引起的准直质量的劣化。靠近光源20的准直透镜2的透镜表面在镜筒3的一个端面处与缩回表面3a接触。在镜筒3的一个端面的外侧的突出表面上，凹槽在相对于光轴O对称的多个位置处形成图11所示的结构。将沉积在凹槽11中的粘合剂15施加到准直透镜2的外周表面上，以将准直透镜2固定在镜筒3中。凹槽11形成为比缩回表面3a浅，粘合剂15不会侵入缩回表面3a。筒3压在形成于筒架主体部分5的内圆周表面上的壁表面上，并通过板簧13具有V形横截面，从而被保持在筒架主体部分5中的特定位置。。每单位温度从准直透镜2的参考表面到保持位置的距离的变化量ΔL被设定为与光源20的移动与参考位置的变化量Δt的总和一致。单位温度和每单位温度的准直透镜2的后焦点的变化量Δf。
主权项	A beam shaping optical device, comprising; a base, a barrel holder held onto the base, a light source held in the barrel holder, a barrel held in the barrel holder, and a collimating lens held in the barrel for converting a beam emitted from the light source into a parallel beam, wherein a difference between an amount of change in the distance from a specified reference position in the barrel holder to a collimating lens holding position per unit temperature and a sum of an amount of change in the movement of the light source from the reference position per unit temperature and an amount of change in the back focus of the collimating lens per unit temperature is set to be equal to or below a specified value.
申请日期	2004-07-06
专利号	EP1662292A2
专利状态	失效
申请号	EP2004747364
公开（公告）号	EP1662292A2
IPC 分类号	G02B27/00 \| G11B7/135 \| G02B \| G02B7/02 \| G02B27/09
专利代理人	-
代理机构	TBK-PATENT
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/53374
专题	半导体激光器专利数据库
作者单位	PANASONIC CORPORATION
推荐引用方式 GB/T 7714	MORI, EISHIN,MATSUZAKI, KEIICHI,,WADA, HIDENORI,et al. Beam shaping optical device, optical head, and optical information medium drive device. EP1662292A2[P]. 2006-05-31.

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