프레넬 렌즈 시트 및 그것을 사용한 배면 투사형 스크린
    2.
    发明公开
    프레넬 렌즈 시트 및 그것을 사용한 배면 투사형 스크린 无效
    FRESNEL镜片和后期投影屏幕使用它

    公开(公告)号:KR1020060101540A

    公开(公告)日:2006-09-25

    申请号:KR1020067012005

    申请日:2004-12-16

    CPC classification number: G03B21/62 G02B3/08

    Abstract: A Fresnel lens sheet which is bright due to a small light quantity loss, is restricted in speckles and ghosts, does not produce moires, and can be used in an inexpensive transmitting screen, wherein the sheet satisfies the diffusion characteristics of the following expressions (1) and (2), or the following expressions (3), (4) and (5). gamma/alpha

    Abstract translation: 由于光量损失小而明亮的菲涅尔透镜片在斑点和重影中受到限制,不产生莫尔条纹,并且可以用在廉价的透射屏幕中,其中片材满足以下表达式的扩散特性(1 )和(2),或下列表达式(3),(4)和(5)。 γ/α<= 2.8(1)zeta /α<= 6(2),其中α是观看半值角,伽玛视角1/10值角,以及zeta观看1/100值角。 2.0°<=α<= 5.5°(3),其中α是观察半值角,γ<= 12°(4),其中γ是观看1/10角度角,zeta <= 18°(5),其中 zeta正在观看1/100值角。

    광학 시트의 제조 방법 및 광학 시트, 그리고 렌티큘러렌즈 시트의 제조 방법
    3.
    发明公开
    광학 시트의 제조 방법 및 광학 시트, 그리고 렌티큘러렌즈 시트의 제조 방법 有权
    生产光学薄片的方法,光学薄片和用于制造透镜薄片的方法

    公开(公告)号:KR1020050104418A

    公开(公告)日:2005-11-02

    申请号:KR1020057016444

    申请日:2004-03-03

    Abstract: A method for producing an optical sheet is disclosed which enables to produce a thin optical sheet having a uniform thickness distribution with high thickness precision, good shaping performance and good transfer performance. An optical sheet produced by such a method is also disclosed. In this method, a resin (15) discharged from a die (11) is passed between a touch roll (12) and a forming roll (13) while being applied with a pressure, thereby being formed into an optical sheet. More specifically, the resin temperature discharged from the die (11) is set between 250°C and 290°C, and the forming rate is set within the range of 8-40 m/min. The air gap between the die (11) and the nipping position of the touch roll (12) and the forming roll (13) is set to be 110 mm or less. An elastic roll whose diametral deformation is not less than 0.01 % of the diameter when a linear pressure of 30 kg/cm is applied is used as the touch roll (12).

    Abstract translation: 公开了一种光学片的制造方法,其能够制造厚度均匀,厚度均匀,成形性能好,转印性能好的薄型光学片。 还公开了通过这种方法制造的光学片。 在该方法中,从模具(11)排出的树脂(15)在施加压力的同时在接触辊(12)和成形辊(13)之间通过,从而形成为光学片。 更具体地说,从模具(11)排出的树脂温度设定在250℃〜290℃之间,成形速度设定在8〜40m /分钟的范围内。 模具(11)与接触辊(12)和成形辊(13)的夹持位置之间的气隙设定为110mm以下。 作为接触辊(12),使用在30kg / cm 2的线性压力下,直径变化不小于直径的0.01%的弹性辊。

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