Projection objective lens arrangement e.g. for movie-theater projection, has diaphragm arranged between second lens and third lens element

Projection objective lens arrangement e.g. for movie-theater projection, has diaphragm arranged between second lens and third lens element

A projection lens for three-chip-(DMD) projection, starting from the side facing the projection wall, has a positive lens (L1) which is a positive meniscus lens; a negative lens (L2) which is a negative meniscus lens; a positive lens element (L3), which is formed from a negative meniscus lens (L31)...

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1. Verfasser: SCHAUS, UDO
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OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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description A projection lens for three-chip-(DMD) projection, starting from the side facing the projection wall, has a positive lens (L1) which is a positive meniscus lens; a negative lens (L2) which is a negative meniscus lens; a positive lens element (L3), which is formed from a negative meniscus lens (L31) and a positive meniscus lens (L32); a negative lens (L4) which is a biconcave lens; a positive lens (L5) formed from a biconvex lens; a positive lens (L6) also formed from a biconvex lens; and a diaphragm arranged between the second lens (L2) and the third lens element (L3;L31,L32). The maximum angle between the main beam and optical axis on the objective side of the projection objective amounts to 2 degrees or less. Das erfindungsgemäße Projektionsobjektiv besteht aus zwei Linsengruppen, zwischen welchen eine Blende vorgesehen ist. Die erste Linsengruppe ist, ausgehend von der der Projektionsfläche zugekehrten Seite, aus einer positiven Meniskuslinse L¶1¶ und einer negativen Meniskuslinse L¶2¶ gebildet, die zweite Linsengruppe aus einem positiven, ein- oder zweigliedrigen Linsenelement L¶3¶; L¶31¶, L¶32¶, einer negativen Bikonkavlinse L¶4¶, sowie zwei positiven Bikonvexlinsen L¶5¶ und L¶6¶ gebildet. DOLLAR A Das Projektionsobjektiv weist bei geringer Linsenzahl und kleinen Abmessungen eine hohe Bildqualität auf. Es ist ferner nahezu telezentrisch und verfügt über eine lange Schnittweite.
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The maximum angle between the main beam and optical axis on the objective side of the projection objective amounts to 2 degrees or less. Das erfindungsgemäße Projektionsobjektiv besteht aus zwei Linsengruppen, zwischen welchen eine Blende vorgesehen ist. Die erste Linsengruppe ist, ausgehend von der der Projektionsfläche zugekehrten Seite, aus einer positiven Meniskuslinse L¶1¶ und einer negativen Meniskuslinse L¶2¶ gebildet, die zweite Linsengruppe aus einem positiven, ein- oder zweigliedrigen Linsenelement L¶3¶; L¶31¶, L¶32¶, einer negativen Bikonkavlinse L¶4¶, sowie zwei positiven Bikonvexlinsen L¶5¶ und L¶6¶ gebildet. DOLLAR A Das Projektionsobjektiv weist bei geringer Linsenzahl und kleinen Abmessungen eine hohe Bildqualität auf. 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The maximum angle between the main beam and optical axis on the objective side of the projection objective amounts to 2 degrees or less. Das erfindungsgemäße Projektionsobjektiv besteht aus zwei Linsengruppen, zwischen welchen eine Blende vorgesehen ist. Die erste Linsengruppe ist, ausgehend von der der Projektionsfläche zugekehrten Seite, aus einer positiven Meniskuslinse L¶1¶ und einer negativen Meniskuslinse L¶2¶ gebildet, die zweite Linsengruppe aus einem positiven, ein- oder zweigliedrigen Linsenelement L¶3¶; L¶31¶, L¶32¶, einer negativen Bikonkavlinse L¶4¶, sowie zwei positiven Bikonvexlinsen L¶5¶ und L¶6¶ gebildet. DOLLAR A Das Projektionsobjektiv weist bei geringer Linsenzahl und kleinen Abmessungen eine hohe Bildqualität auf. 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The maximum angle between the main beam and optical axis on the objective side of the projection objective amounts to 2 degrees or less. Das erfindungsgemäße Projektionsobjektiv besteht aus zwei Linsengruppen, zwischen welchen eine Blende vorgesehen ist. Die erste Linsengruppe ist, ausgehend von der der Projektionsfläche zugekehrten Seite, aus einer positiven Meniskuslinse L¶1¶ und einer negativen Meniskuslinse L¶2¶ gebildet, die zweite Linsengruppe aus einem positiven, ein- oder zweigliedrigen Linsenelement L¶3¶; L¶31¶, L¶32¶, einer negativen Bikonkavlinse L¶4¶, sowie zwei positiven Bikonvexlinsen L¶5¶ und L¶6¶ gebildet. DOLLAR A Das Projektionsobjektiv weist bei geringer Linsenzahl und kleinen Abmessungen eine hohe Bildqualität auf. Es ist ferner nahezu telezentrisch und verfügt über eine lange Schnittweite.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
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OPTICS
PHYSICS
title Projection objective lens arrangement e.g. for movie-theater projection, has diaphragm arranged between second lens and third lens element
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