JPS61140346U - - Google Patents

Info

Publication number

JPS61140346U

JPS61140346U JP1985024446U JP2444685U JPS61140346U JP S61140346 U JPS61140346 U JP S61140346U JP 1985024446 U JP1985024446 U JP 1985024446U JP 2444685 U JP2444685 U JP 2444685U JP S61140346 U JPS61140346 U JP S61140346U

Authority

JP

Japan

Prior art keywords

fresnel lens

screen

utility

model registration

straight

Prior art date

1985-02-22

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

Links

• Espacenet
• Global Dossier
• Discuss

• 239000000470 constituent Substances 0.000 claims description 4
• 230000005540 biological transmission Effects 0.000 claims description 2
• 238000010586 diagram Methods 0.000 description 5
• 238000009792 diffusion process Methods 0.000 description 1
• 238000004519 manufacturing process Methods 0.000 description 1