JPS641987A - Projection type display apparatus for ppi radar image - Google Patents

Projection type display apparatus for ppi radar image

Info

Publication number
JPS641987A
JPS641987A JP15530987A JP15530987A JPS641987A JP S641987 A JPS641987 A JP S641987A JP 15530987 A JP15530987 A JP 15530987A JP 15530987 A JP15530987 A JP 15530987A JP S641987 A JPS641987 A JP S641987A
Authority
JP
Japan
Prior art keywords
optical system
ppi radar
mirror scanner
radar image
scanner
Prior art date
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.)
Pending
Application number
JP15530987A
Other languages
Japanese (ja)
Other versions
JPH011987A (en
Inventor
Yoshizo Hagino
Hiroaki Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Radio Co Ltd
Original Assignee
Japan Radio Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Radio Co Ltd filed Critical Japan Radio Co Ltd
Priority to JP15530987A priority Critical patent/JPS641987A/en
Publication of JPH011987A publication Critical patent/JPH011987A/en
Publication of JPS641987A publication Critical patent/JPS641987A/en
Pending legal-status Critical Current

Links

Landscapes

  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE: To prevent two projected images from being superposed on each other near the center point of a screen and obtain a clear rotary projected image by providing a second optical system constituted by a variable curvature conical lens between a polygonal mirror scanner and a dub prism.
CONSTITUTION: A second optical system 31 constituted by a variable curvature conical lens is provided between a polygonal mirror scanner 2 and a dub prism 3. Light from a laser light source 7 is intensity-modulated by a video signal determined by the intensity of the received echo of a PPI radar instrument in an AOM 8 and falls upon the mirror scanner 2. The incident light is reflected from the scanner 2 and deflected in a direction R. When a reflected beam falls upon the second optical system 31, an incident point is different depending on the distance of a PPI radar image. As a result, the width of the light beam is narrow when the distance is small and wide when large. Accordingly, two projected images with an address (n) in a direction θ and with the subsequent address n+1 are not unnecessarily superposed on each other near a center point.
COPYRIGHT: (C)1989,JPO&Japio
JP15530987A 1987-06-24 1987-06-24 Projection type display apparatus for ppi radar image Pending JPS641987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15530987A JPS641987A (en) 1987-06-24 1987-06-24 Projection type display apparatus for ppi radar image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15530987A JPS641987A (en) 1987-06-24 1987-06-24 Projection type display apparatus for ppi radar image

Publications (2)

Publication Number Publication Date
JPH011987A JPH011987A (en) 1989-01-06
JPS641987A true JPS641987A (en) 1989-01-06

Family

ID=15603075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15530987A Pending JPS641987A (en) 1987-06-24 1987-06-24 Projection type display apparatus for ppi radar image

Country Status (1)

Country Link
JP (1) JPS641987A (en)

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