JPH055544Y2 - - Google Patents

Info

Publication number

JPH055544Y2

JPH055544Y2 JP18419887U JP18419887U JPH055544Y2 JP H055544 Y2 JPH055544 Y2 JP H055544Y2 JP 18419887 U JP18419887 U JP 18419887U JP 18419887 U JP18419887 U JP 18419887U JP H055544 Y2 JPH055544 Y2 JP H055544Y2

Authority

JP

Japan

Prior art keywords

variable

lens

focal length

magnification

illumination angle

Prior art date

1987-12-02

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.)

Expired - Lifetime

Links

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• 238000005286 illumination Methods 0.000 claims description 21
• 238000004804 winding Methods 0.000 claims description 12
• 230000000007 visual effect Effects 0.000 claims 1
• 238000005259 measurement Methods 0.000 description 2
• 229910000831 Steel Inorganic materials 0.000 description 1
• 238000005452 bending Methods 0.000 description 1
• 230000005540 biological transmission Effects 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 238000004519 manufacturing process Methods 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 125000006850 spacer group Chemical group 0.000 description 1
• 239000010959 steel Substances 0.000 description 1
• 229920003002 synthetic resin Polymers 0.000 description 1
• 239000000057 synthetic resin Substances 0.000 description 1
• 230000007704 transition Effects 0.000 description 1