Focal Distance - Revision history

Minsuids at 02:57, 3 February 2024

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	[[Category:Alphabetical Index]]		[[Category:Alphabetical Index]]
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Oferiks: 1 revision

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	The distance measured along the optical axis of the lens or reflector between the focus and (in practice) the point where the optical axis intersects the nearer surface of the lens or reflector.		The distance measured along the optical axis of the lens or reflector between the focus and (in practice) the point where the optical axis intersects the nearer surface of the lens or reflector.

	[[Image:Ch2_Fig10.jpg\|400px]]		[[Image:Ch2_Fig10.jpg\|400px\|border]]


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	The distance, measured along a straight line through the focus and normal to the axis (2-2-115), between the focus and (in practice) the point where the line intersects the inner surface of the lens. (Fig. 16b)		The distance, measured along a straight line through the focus and normal to the axis (2-2-115), between the focus and (in practice) the point where the line intersects the inner surface of the lens. (Fig. 16b)

	[[Image:Ch2_Fig16b.jpg\|400px]]		[[Image:Ch2_Fig16b.jpg\|400px\|border]]

Oferiks at 08:58, 1 March 2009

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	The distance, measured along a straight line through the focus and normal to the axis (2-2-115), between the focus and (in practice) the point where the line intersects the inner surface of the lens. (Fig. 16b)		The distance, measured along a straight line through the focus and normal to the axis (2-2-115), between the focus and (in practice) the point where the line intersects the inner surface of the lens. (Fig. 16b)

	[[Image:~~Ch2_Fig16~~.jpg\|400px]]		[[Image:Ch2_Fig16b.jpg\|400px]]

Oferiks at 12:00, 25 February 2009

2009-02-25T12:00:00Z

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Oferiks: 1 revision

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	{{languages\|Focal Distance}}		{{languages\|Focal Distance}}
	[[Category:2.2 Optical Apparatus]		[[Category:2.2 Optical Apparatus]]
	[[Category:Alphabetical Index]]		[[Category:Alphabetical Index]]
	[[Category:IALA Dictionary 1970-89 Edition]]		[[Category:IALA Dictionary 1970-89 Edition]]

Oferiks: 1 revision

2009-02-25T00:00:43Z

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Oferiks at 12:00, 15 February 2009

2009-02-15T12:00:00Z

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'''2-2-160

Alternative term: Focal Length

1. (Of a lens, other than a fixed lens, or of a focusing reflector).

The distance measured along the optical axis of the lens or reflector between the focus and (in practice) the point where the optical axis intersects the nearer surface of the lens or reflector.

[[Image:Ch2_Fig10.jpg|400px]]

2. (Of a fixed lens).

The distance, measured along a straight line through the focus and normal to the axis (2-2-115), between the focus and (in practice) the point where the line intersects the inner surface of the lens. (Fig. 16b)

[[Image:Ch2_Fig16.jpg|400px]]

{{IALAFooter}}

{{languages|Focal Distance}}
[[Category:2.2 Optical Apparatus]
[[Category:Alphabetical Index]]
[[Category:IALA Dictionary 1970-89 Edition]]