Title:
OPTICAL ELEMENT PROVIDED WITH ANTI-REFLECTION FILM
Document Type and Number:
WIPO Patent Application WO/2023/210100
Kind Code:
A1
Abstract:
This optical element comprises a micro-lens array on a first surface and an anti-reflection film on a second surface, and is configured so as to cause a light flux, which has entered from the first surface and is parallel to the center axis of each micro-lens, to diverge from the second surface such that the maximum value of the angle formed between the center axis and diverged light beam is D. Each micro-lens is configured to satisfy Z/P≥0.8, where Z is the distance from the top to the bottom surface, and P is the diameter of the smallest circle surrounding the bottom surface. The anti-reflection film is formed to satisfy {T(0)/T(D)}/{T'(0)/T'(D)}≤0.85 and further configured to satisfy {T(0)/T(D)}/{T'(0)/T'(D)}≤Z/P, where T(0) and T(D) are the incident angle 0 and the transmittance of the incident light beam of D, respectively, and T'(0) and T'(D) are the incident angle 0 on an optical element main body surface not having the anti-reflection film and the transmittance of the incident light beam of D, respectively.
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Inventors:
ISHII KENTA (JP)
SAKOHIRA YOSUKE (JP)
ENDO MASANORI (JP)
KODAMA TOSHIYUKI (JP)
SAKOHIRA YOSUKE (JP)
ENDO MASANORI (JP)
KODAMA TOSHIYUKI (JP)
Application Number:
PCT/JP2023/004144
Publication Date:
November 02, 2023
Filing Date:
February 08, 2023
Export Citation:
Assignee:
NALUX CO LTD (JP)
International Classes:
G02B3/00; G02B1/113; G02B1/115
Domestic Patent References:
| WO2022168565A1 | 2022-08-11 | |||
| WO2022097576A1 | 2022-05-12 | |||
| WO2019230758A1 | 2019-12-05 |
Foreign References:
| JP2021002632A | 2021-01-07 | |||
| JP2005173029A | 2005-06-30 |
Attorney, Agent or Firm:
FUSHIMI, Naoya (JP)
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