US 11,143,794 B2Granted

Optical film

AssigneeShine Optoelectronics (Kunshan) Co., Ltd.

InventorJian Zhang

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Abstract

This application discloses an optical film, comprising: a polymer having a first surface and a second surface, the first surface and the second surface opposing to each other; a microlens structure being formed on the first surface, an accommodation structure being formed on the second surface, the accommodation structure accommodating a number of pattern structures imaging through the microlens structure; the microlens structure and the accommodation structure being integral; and the micro-focusing units and the pattern structures being adapted to each other, so that the optical film forms at least one image floating in the optical film when the optical film is viewed from a side of the pattern structures or a side of the micro-focusing units. A substrate layer is omitted from the optical film, hence, the optical film is reduced in thickness, and mechanical performance is not good, which makes the optical film easy to be cut in thermoprinting.

Claims15

Dependent claims

A 3D floating imaging optical film comprising:

a transparent spacer layer having two surfaces opposing to each other;
a micro-focusing unit array layer provided on one of the surfaces of the transparent spacer layer, the micro-focusing unit array layer comprising a number of asymmetrically distributed micro-focusing units;
and
a micro graphic and text unit array layer provided on another surface of the transparent spacer layer opposite the micro-focusing unit array layer, the micro graphic and text unit array layer comprising a number of micro graphic and text units;
the micro-focusing unit array layer being adapted to the micro graphic and text unit array layer, so that the 3D floating imaging optical film is able to form one and only one floating image floating in the transparent spacer layer when the 3D floating imaging optical film is viewed from a side of the micro graphic and text units or a side of the micro-focusing units;
wherein, a height of the floating image is calculated as:
d
i
=
f
-
R
1
-
X
MPA
X
MLA
+
R
,
wherein, di is the height of the floating image, R is a radius of curvature of the micro-focusing units, f is a focal length of the micro-focusing units, xMLA is a coordinate value of the micro-focusing units, and xMPA is a coordinate value of the micro graphic and text units;
wherein aperiodic distribution of the micro-focusing units are obtained by transforming square dot matrices according to functions ξi=−xoi− arg sinh (yoi), ηi=yoi− arg sinh (xoi) and taking coordinates of the dot matrices as centers of the micro-focusing units, where, xoi and yoi are the position coordinates of the square dot matrices, ξi and ηi are the position coordinates of the micro-focusing units;
wherein position coordinates of the micro graphic and text units are obtained by transforming position coordinates of the corresponding micro-focusing units;
wherein the transform comprises one of the following or a combination thereof:
a coordinate scaling transform and a coordinate rotational transform.

23 more elements

A micro optical imaging film comprising:

a transparent spacer layer having a first surface and a second surface opposing to the first surface;
a micro-transmission focusing unit array layer provided on the first surface of the transparent spacer layer, the micro-transmission focusing unit array layer comprising at least two asymmetrically distributed micro-transmission focusing units;
and
a graphic and text variable layer provided on the second surface of the transparent spacer layer, the graphic and text variable layer comprising at least two micro graphic and text units, the micro graphic and text units comprising dot matrices having connected and/or disconnected states;
the micro graphic and text units being adapted to the micro-transmission focusing units, so that the micro optical imaging film forms one and only one floating image at a side of the micro-transmission focusing units away from the micro graphic and text units via all dot matrices in the connected state;
wherein, a height of the floating image is calculated as:
d
i
=
f
-
R
1
-
X
MPA
X
MLA
+
R
,
wherein, di is the height of the floating image, R is a radius of curvature of the micro-transmission focusing units, f is a focal length of the micro-transmission focusing units, XMLA is a coordinate value of the micro-transmission focusing units, and xMPA is a coordinate value of the micro graphic and text units;
wherein aperiodic distribution of the micro-transmission focusing units are obtained by transforming square dot matrices according to functions ξi=−xoi− arg sinh (yoi), ηi=yoi− arg sinh (xoi) and taking coordinates of the dot matrices as centers of the micro-transmission focusing units, where, xoi, and yoi, are the position coordinates of the square dot matrices, ξi and ηi are the position coordinates of the micro-transmission focusing units;
wherein position coordinates of the micro graphic and text units are obtained by transforming position coordinates of the corresponding micro-transmission focusing units;
wherein the transform comprises one of the following or a combination thereof:
a coordinate scaling transform and a coordinate rotational transform.

23 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/865,241Filed 8 Jan 2018 · continuation
Priority: CN 201510397444.88 Jul 2015
Published: US 2018/0196166 A112 Jul 2018
Granted: 12 Oct 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B42D 25/324
Identification or security features, e.g. for preventing forgery: reliefs
B42D 25/342
Identification or security features, e.g. for preventing forgery: moiré effects
G02B 1/04
Optical elements characterised by the material of which they are made; Optical coatings for optical elements: made of organic materials, e.g. plastics
G02B 3/00
Simple or compound lenses