201107148 六、發明說明： 【發明所屬之技術領域】 本發明是關於使用於將光硬化型的液體材料吐出於基 材而形成圖案的印表機的光照射裝置。 【先前技術】 藉由凹版印刷方式可簡便又低成本地可製作畫像的理 由之故，因而噴墨記錄方式應用於照相、各種印刷、標記 、濾色片的所謂特殊印刷等的各種印刷領域。 噴墨式印表機是以油墨的種類可加以分類，惟其中有 使用藉由紫外線等的光的照射使之硬化的光硬化型油墨的 光硬化型噴墨方式。光硬化型噴墨方式是較低臭氣，除了 無用紙以外，也可記錄在連乾性、無油墨吸收性的記錄媒 體之點受到注目。 在此種光硬化型噴墨方式的噴墨式印表機中，將油墨 作成微小液滴而吐出於基材（記錄媒體）的記錄噴頭以外 ，也有放射光的光源裝載於輸送筒，而在記錄媒體上仍點 亮光源的狀態下移動滑架，而在被彈著於記錄媒體之後的 油墨照射光而將該油墨予以硬化。 第5圖是專利文獻1所述的光照射裝置的斷面圖。第 5 ( a )圖是沿著移動以平面切剖的斷面圖，第5 ( b )圖是 以正交於噴頭部的移動方向的平面所切剖的斷面圖。 以具有旋轉拋物面狀的反射面的反射器20反射來自 短弧型放電燈10的光，然後，藉由僅聚光一軸方向的柱 201107148 面透鏡3 0被線狀地聚光。具有沿著線狀地聚光的光的長 度方向延伸的反射面的反射構件5 0設於兩側。兩枚反射 構件5 0是隨著朝向基材5，傾斜成使得兩者接觸。 從放電燈10所放射的光，是藉由具有旋轉拋物面狀 的反射面的反射器20被反射，作爲平行光而朝著柱面透 鏡30被照射。被入射於柱面透鏡30的平行光，是不會直 接以平行光被聚光在柱面透鏡30的軸方向，而是一面僅 被聚光於正交於柱面透鏡30的軸方向的方向一面經由光 出射口 40被出射。又，在柱面透鏡30的焦點位置，形成 有朝著柱面透鏡3 0的軸方向線狀地延伸的光照射領域。 又，在專利文獻2，記載著並聯地排列著以短波長成 分具有於發光波長峰値的棒狀紫外線光源，及以長波長成 分具有於發光波長峰値的棒狀紫外線光源的光照射裝置。 組合以不相同的波長具有於發光波長峰値的紫外線光源而 藉由照射於油墨，一倂硬化感度波長的油墨。 專利文獻1 :日本特開2009-125977號公報 專利文獻2 :日本特開2004-188864號公報 【發明內容】 然而’即使使用如上述的光照射裝置進行硬化油墨， 也會發生未充分地硬化的情形。尤其是在爲了工件的低溫 化僅使用表示於第5圖的點光源的光照射裝置中，會看到 油墨未充分地硬化的趨勢。作爲其原因之一，對於紫外線 硬化性油墨所必需要的最適當的波長並不一定之故，因而 -6- 201107148 藉由油墨的種類可能成爲有感度不充分的情形。 又，將具備吐出油墨的記錄噴頭與放射光的光源的滑 架對於基材操作成進行掃描，惟從光源所放射的光成爲不 充分之故，因而會發生油墨硬化不足的情形。 本發明是爲了解決如以上的問題而創作者，不會發生 油墨的硬化不充分，確實地可硬化寬闊種類的紫外線硬化 性油墨’又，有效果地組合發光波長峰値不相同的點狀光 源與線狀光源，可實現形成小型的光照射裝置作爲目的。 爲了解決上述課題，在本發明中，如以下地構成上述 光照射裝置。 (1)—種光照射裝置，具備：將光硬化型的液體材 料吐出於基材的記錄噴頭，及具有照射被吐出於上述基材 而用以硬化被彈著的液體材料的光的光照射裝置的頭部， 使一面相對地移動頭部與基材，一面將液體材料從記錄噴 頭吐出於基材，藉由光照射裝置照射光於彈著在基材上的 液體材料，藉此，將液體材料予以硬化而形成圖案的印表 機所使用的光照射裝置，其特徵爲：在該光照射裝置，設 置發光波長峰値不同的點光源與線狀光源。 上述點光源是具備將出射光線狀地聚光的光學元件， 上述線狀光源是其長度方向配置成沿著線狀地聚光的上述 點光源的光的長度方向，而且配置成來自基材的距離比上 述點光源還要短的位置。 (2 )在上述（1 )中，在上述點光源的兩側，沿著該 點光源的線狀地聚光的光的長度方向，配置有至少設有點 201107148 光源的一側的面以反射面所形成的平面狀的反射構件，上 述反射構件的上述點光源的照射領域的相反側的位置，位 在鄰接於該反射構件的位置，配置有上述線狀光源。 (3) 在上述（1 ) 、 （ 2)中，作爲點光源使用發光 二極體。 (4) 在上述（1) 、（2)中，作爲點光源使用短弧 型放電燈。 (5) 在上述（1) 、 （2) 、 （3) 、 （4)中，作爲 線狀光源使用低壓水銀燈。 在本發明中，可得到以下的效果。 (1)在彈著於基材上的液體材料藉由照射光，硬化 液體材料而形成圖案的印表機所使用的光照射裝置中，設 置發光波長峰値不相同的點光源與線狀光源，並將從點光 源所放射的光的波長，及從線狀光源所放射的光的波長作 成不相同之故，因而即使爲了油墨硬化所必需的波長是並 不一定，也可對應於各種油墨。 又，設置線狀地聚光點光源的出射光的光學元件，線 狀地聚光點光源的出射光，提昇峰値照度而可形成朝長度 方向均勻的光照射領域。 又，將線狀光源近接於基材加以配置，就可減小衰減 而可提昇峰値照度。 如此地提昇峰値照度之故，因而油墨硬化所必需的能 量會變小，而硬化所必需的時間也變短就可以。又，抑制 照射量而可硬化油墨之故，因而可減低對於基材的損傷， -8 - 201107148 而也可提高處理速度。 (2 )在點光源的兩側配置平面狀的反射構件，該反 射構件的上述點光源的照射領域的相反側的位置而在位於 鄰接於該反射構件的位置配置上述線狀光源之故，因而有 效利用死空間而可配置線狀光源，不必加大光照射裝置， 成爲可配置點光源與線狀光源。 又，來自點光源的照射光未包含可視或紅外線之故， 因而對燈具下面附近的溫度影響也少。還有，藉由反射構 件來遮光來自點光源的光，作成來自點光源的照射光不會 碰到線狀光源之故，因而對線狀光源不會給予熱性影響。 (3)作爲點光源使用發光二極體或短弧型放電燈， 而作爲線狀光源使用低壓水銀燈，可得到輸出幾乎沒有射 出可視紫外線的45 Onm以下的波長的光源。又，對硬化油 墨幾乎不會有所貢獻，而且不會將成爲基材的溫度上昇的 原因的可視，紅外線照射在基材。 【實施方式】 以下，針對於本發明的實施形態進行說明。 A.第1實施形態 第1圖是表示本發明的噴墨式印表機的頭部的槪略構 成的立體圖。在同圖中，表示爲了容易瞭解而作成可看到 光照射裝置的內部，而省略一部分的光學零件。 噴墨式印表機1是具有棒狀導軌2，而在此導軌2, _ 9 - 201107148 支撐著滑架3。滑架3是藉由滑架驅動機構，沿著導軌2 (X方向）往復移動基材5上。 在滑架3，裝載著設有吐出油墨的噴嘴的記錄噴頭4 。在沿著記錄噴頭4的滑架3的移動方向的兩側’設有光 照射裝置6。在光照射裝置6，如下述地設有發光波長峰 値不相同的點狀光源與線狀光源，對於從記錄噴頭4的噴 嘴被吐出於基材5的液體材料的油墨，照射於點狀光源與 線狀光源所放射的光。 又，如下述地，點狀光源是具備線狀地聚光出射光的 光學元件或反射構件，線狀光源是具備將光予以線狀地聚 光所用的例如槽狀反射鏡，惟在同圖中被省略。被收納於 滑架3的記錄噴頭4，是在對於導軌2垂直方向（Y方向 )排列著噴嘴，朝Y方向較長地照射油墨。光照射裝置6 也用以硬化朝Y方向較長地所噴上的油墨，對應於記錄噴 頭4成爲需要朝著Y方向較長的照射領域。所以，在光照 射裝置6，具備朝Y方向較長的線狀地整形照射光的手段 〇 第2圖是本發明的第1實施形態的光照射裝置的斷面 圖。（a)是X方向（沿著頭部的移動方向的方向）的斷 面圖，（b)是Y方向（正交於頭部的移動方向的方向） 的斷面圖。 光照射裝置6是具備在外裝蓋體8內照射紫外線領域 的光的兩個光源，其中一方爲點光源的放電燈10，另一方 爲線狀光源的低壓水銀燈11。將從點光源所放射的光的波 -10- 201107148 長，及從線狀光源所放射的光的波長，作成不 使爲了硬化油墨所必需的波長是並不一定，成 於各種的油墨。 例如，從點光源有效率地放射波長3 00〜 外光，而作成從線狀光源可放射以波長254nm 波長的紫外光，則也可硬化使用在波長3 00nm 度的α -胺基酮系的光引發劑的油墨，又也可 波長260nm附近具有感度的α-羥基酮系的光BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light irradiation device for a printer that forms a pattern by discharging a photocurable liquid material out of a substrate. [Prior Art] Since the gravure printing method can easily and inexpensively produce an image, the ink jet recording method is applied to various printing fields such as photography, various printing, marking, and so-called special printing of color filters. The ink jet printer is classified into a type of ink, and is a photocurable inkjet method using a photocurable ink which is cured by irradiation with light such as ultraviolet rays. The photo-curing type ink-jet type is a lower odor, and it can be recorded in a continuous drying or ink-absorptive recording medium in addition to paper. In such an inkjet printer of the photocurable inkjet system, a light source that emits light as a small droplet and is discharged from a substrate (recording medium) is also mounted on the transport cylinder, and The carriage is moved while the light source is still lit on the recording medium, and the ink is irradiated with light after being bounced on the recording medium to harden the ink. Fig. 5 is a cross-sectional view of the light irradiation device described in Patent Document 1. Fig. 5(a) is a cross-sectional view taken along a plane, and Fig. 5(b) is a cross-sectional view taken along a plane orthogonal to the moving direction of the head portion. The light from the short arc type discharge lamp 10 is reflected by the reflector 20 having a reflecting surface having a paraboloid of revolution, and then the lens is condensed linearly by the column 2011048 which is only condensed in one axial direction. A reflecting member 50 having a reflecting surface extending in the longitudinal direction of the light condensed linearly is provided on both sides. The two reflecting members 50 are inclined toward the substrate 5 so that they are in contact with each other. The light emitted from the discharge lamp 10 is reflected by the reflector 20 having a paraboloidal reflecting surface, and is irradiated toward the cylindrical lens 30 as parallel light. The parallel light incident on the cylindrical lens 30 is not directly condensed in the axial direction of the cylindrical lens 30 by the parallel light, but is condensed only in the direction orthogonal to the axial direction of the cylindrical lens 30. One side is emitted through the light exit opening 40. Further, at the focus position of the cylindrical lens 30, a light irradiation region extending linearly in the axial direction of the cylindrical lens 30 is formed. Further, Patent Document 2 discloses a light-emitting device in which a rod-shaped ultraviolet light source having a short-wavelength component having a peak wavelength of an emission wavelength and a rod-shaped ultraviolet light source having a long-wavelength component having a peak wavelength of an emission wavelength are arranged in parallel. The ultraviolet light source having a peak wavelength of the emission wavelength at a different wavelength is combined and the ink of the sensitivity wavelength is hardened by irradiation with the ink. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2004-188864 (Patent Document 2) However, even if the ink is hardened by using the light irradiation device as described above, insufficient hardening occurs. situation. In particular, in the light irradiation apparatus using only the point light source shown in Fig. 5 for the low temperature of the workpiece, it is seen that the ink does not sufficiently harden. One of the reasons for this is that the most suitable wavelength necessary for the ultraviolet curable ink is not necessarily the case, and thus -6-201107148 may be insufficient in sensitivity due to the type of the ink. Further, the carriage having the recording head for discharging the ink and the light source for emitting light is scanned for the substrate, but the light emitted from the light source is insufficient, so that the ink hardening is insufficient. The present invention has been made to solve the above problems, and the creator does not cause insufficient curing of the ink, and can reliably harden a wide variety of ultraviolet curable inks. In addition, it is effective to combine point light sources having different emission wavelength peaks. With the linear light source, it is possible to form a small light irradiation device. In order to solve the above problems, in the present invention, the above-described light irradiation device is constructed as follows. (1) A light irradiation device comprising: a recording head that discharges a photocurable liquid material to a substrate; and a light irradiation that irradiates light that is discharged from the substrate to harden the liquid material that is being bounced The head of the device moves the liquid material from the recording head to the substrate while moving the head and the substrate relative to each other, and irradiates the liquid material that is bounced on the substrate by the light irradiation device, thereby A light irradiation device used in a printer for curing a liquid material to form a pattern is characterized in that a point light source and a linear light source having different emission wavelength peaks are provided in the light irradiation device. The point light source includes an optical element that condenses light in an outgoing light, and the linear light source is in a longitudinal direction of light of the point light source that is arranged to condense in a linear direction in a longitudinal direction, and is disposed from a substrate. The distance is shorter than the above point source. (2) In the above (1), on both sides of the point light source, a surface on which one side of the light source is provided with at least a point 201107148 is disposed along a longitudinal direction of the linearly concentrated light of the point light source. The formed planar reflecting member is disposed at a position on the opposite side of the irradiation region of the point light source of the reflecting member at a position adjacent to the reflecting member, and the linear light source is disposed. (3) In the above (1) and (2), a light-emitting diode is used as a point light source. (4) In the above (1) and (2), a short arc type discharge lamp is used as the point source. (5) In the above (1), (2), (3), and (4), a low-pressure mercury lamp is used as the linear light source. In the present invention, the following effects can be obtained. (1) A point light source and a linear light source having different emission wavelength peaks in a light irradiation device used in a printer that forms a pattern by irradiating light and hardening a liquid material on a liquid material that is impinging on a substrate And the wavelength of the light emitted from the point source and the wavelength of the light emitted from the linear light source are different. Therefore, even if the wavelength necessary for the curing of the ink is not constant, it can correspond to various inks. . Further, an optical element that emits light in a line-like concentrating point light source is provided, and the light emitted from the point source is linearly condensed to increase the peak illuminance to form a field of light irradiation uniform in the longitudinal direction. Further, by arranging the linear light source in close proximity to the substrate, the attenuation can be reduced and the peak illuminance can be improved. By increasing the peak illuminance in this way, the energy required for the hardening of the ink becomes small, and the time required for hardening becomes short. Further, since the amount of irradiation can be suppressed and the ink can be hardened, damage to the substrate can be reduced, and the processing speed can be improved by -8 - 201107148. (2) arranging a planar reflecting member on both sides of the point light source, and the linear light source is disposed at a position adjacent to the reflecting member at a position opposite to the irradiation region of the point light source of the reflecting member, and thus The linear light source can be configured by effectively utilizing the dead space, and it is not necessary to increase the light irradiation device to become a configurable point light source and a linear light source. Further, since the illumination light from the point light source does not include visible or infrared rays, it has little influence on the temperature in the vicinity of the lower surface of the lamp. Further, the light from the point light source is shielded by the reflecting member, so that the irradiation light from the point light source does not hit the linear light source, and thus the linear light source is not given thermal influence. (3) A light-emitting diode or a short-arc discharge lamp is used as the point light source, and a low-pressure mercury lamp is used as the linear light source, and a light source having a wavelength of 45 Onm or less which emits almost no visible ultraviolet light can be obtained. Further, it hardly contributes to the hardened ink, and it does not cause the temperature of the substrate to rise, and the infrared rays are irradiated onto the substrate. [Embodiment] Hereinafter, embodiments of the present invention will be described. A. First Embodiment Fig. 1 is a perspective view showing a schematic configuration of a head portion of an ink jet printer according to the present invention. In the same figure, it is shown that the inside of the light irradiation device can be seen for easy understanding, and a part of the optical components are omitted. The ink jet printer 1 has a rod-shaped guide rail 2, and the guide rail 2, _9 - 201107148 supports the carriage 3. The carriage 3 is reciprocally moved on the substrate 5 along the guide rail 2 (X direction) by a carriage driving mechanism. In the carriage 3, a recording head 4 provided with a nozzle for discharging ink is placed. The light irradiation means 6 is provided on both sides ' along the moving direction of the carriage 3 of the recording head 4. In the light irradiation device 6, a point light source and a linear light source having different emission wavelength peaks are provided as follows, and the ink of the liquid material discharged from the nozzle of the recording head 4 to the substrate 5 is irradiated to the point light source. Light emitted by a linear light source. Further, as described below, the point light source is an optical element or a reflection member that condenses and emits light linearly, and the linear light source is provided with, for example, a groove mirror for condensing light linearly, but in the same figure. Was omitted. The recording head 4 accommodated in the carriage 3 is such that the nozzles are arranged in the vertical direction (Y direction) of the guide rail 2, and the ink is irradiated for a long time in the Y direction. The light irradiation device 6 is also used to harden the ink sprayed in the Y direction for a long time, and corresponds to the recording head 4 which is required to be irradiated in the Y direction. Therefore, the light-emitting device 6 is provided with a means for shaping the irradiation light in a line shape that is long in the Y direction. FIG. 2 is a cross-sectional view of the light irradiation device according to the first embodiment of the present invention. (a) is a cross-sectional view in the X direction (direction along the moving direction of the head), and (b) is a cross-sectional view in the Y direction (direction orthogonal to the moving direction of the head). The light irradiation device 6 is a low-pressure mercury lamp 11 including two light sources that emit light in the ultraviolet field in the exterior cover 8, one of which is a discharge lamp 10 of a point light source, and the other of which is a linear light source. The wavelength of the light emitted from the point light source is -10-201107148, and the wavelength of the light emitted from the linear light source is not necessarily the wavelength necessary for curing the ink, and is formed into various inks. For example, it is possible to efficiently emit a wavelength of 300 00 to external light from a point source, and to generate ultraviolet light having a wavelength of 254 nm from a linear light source, and it is also possible to use an α-amino ketone system at a wavelength of 300 nm. The photoinitiator ink can also have a sensitivity of α-hydroxyketone light near 260 nm.
Bm n 墨。 在金屬鹵化物燈或高壓水銀燈的長弧棒狀 取出紫外線光帶的光之故，因而在本發明使用 第2圖所示地，作爲點光源，可使用有效率地 長300〜450nm的紫外光的短弧的超高壓水銀: 又，如下述地也可使用發光元件（LED)。 爲了線狀地聚光點光源，必須擴展照射領 須重疊光之故，因而採用點光源與基材之間隔 用點光源與基材之間隔者，就可提高長度方向 勻性。 在第2圖中，作爲點光源使用短弧的超高 燈1 〇，爲了朝基材反射從點光源所放射的光使 20。作爲反射鏡20，例如可使用具有旋轉橢圓 面的聚光鏡，或是具有旋轉拋物面的反射面的 此，表示使用具有旋轉拋物面狀的反射面的聚 相同者，即 爲也可對應 450nm的紫 作爲主發光 以上具有感 硬化使用在 引發劑的油 光源很難僅 點光源。如 放射例如波 玫電燈1 0， 域，或是必 者較佳。採 的照度的均 壓水銀放電 用著反射鏡 面狀的反射 聚光鏡。在 光鏡的情形 -11 - 201107148 短弧型放電燈10，是例如有效率地放射波長300〜 4 5 0nm的紫外光的超高壓水銀放電燈所成，在放電容器內 相對配置有一對電極使得電極間距離成如例如0.5〜 2.0 m m的狀態》 發光物質的水銀爲例如封入0.08〜0.3 Omg/mm3。又， 起動補助用的緩衝氣體的稀有氣體以及圖案也分別以所定 封入量被封入。放電燈1 0是連結一對電極的直線沿著反 射鏡20的光軸延伸的方式所配置，而放電燈1〇的發光部 —致於反射鏡20的第1焦點方式所配置。 例舉一例，電極間距離爲1.3mm，電力200W，300nm 〜400nm的波長帶的紫外光輸出爲 16W，而 3 00nm〜 450nm的紫外光輸出爲25W。 爲點光源之故，因而藉由以反射鏡作波長狀而進行反 射，容易地可得到輸出幾乎不會出射於可視紅外線的 4 5 0nm以下的波長的光源。成爲不會將對硬化油墨上幾乎 沒有貢獻，而且成爲基材的溫度上昇的原因的可視，紅外 線照射在基材》 又，在上述說明了一只放電燈10的情形，惟爲了提 高輸出，藉由複數的放電燈10也可構成點光源。 線狀光源是即使未介設光學系也可形成細長的照射領 域。所以，靠近點光源與基材之間隔者，可減小光的衰減 ，可提高利用效率。 在第2圖中，作爲線狀光源使用兩支低壓水銀燈11， 將此些配置在光照射器的光出射口 40的附近，而在背面 -12- 201107148 設置槽狀反射鏡1 2使之線狀地聚光。 如第2圖所示地’作爲線狀光源，可使用有效率地放 射例如主發光波長254nm的紫外光的低壓水銀燈。低壓水 銀燈（低壓水銀蒸氣放電燈），是例如在發光管的兩端箍 縮密封著電極支架，而在發光管內封入有氬氣體約3 OOPa 與水銀。一般放電是經兩個電極而藉由將電能供應於混合 氣體所保持。此放射主要爲由稱爲陽光柱的部分被放射藉 由波長185nm、245nm的水銀的諧振放射所構成。利用合 成玻璃來形成發光管，則有效地可穿透2 OOnm以下的紫外 線，惟在發光管使用其他玻璃時無法穿透之故，因而在基 材主要照射著波長254nm的光。 例舉一例，直徑φ 8mm，發光長70mm，電力5W、 2 54nm的主發光波長的紫外光輸出是1.5W。 上述點光源是具備線狀地聚光出射光的光學元件。在 第2圖中，線狀地聚光出射光的聚光機構，是柱面透鏡3 0 與反射構件5 0。 從點光源的放電燈1 〇所放射的光，是藉由具有旋轉 拋物面狀的反射面的反射鏡20所反射，作爲平行光入射 於柱面透鏡3 0。 在柱面透鏡30中，在柱面透鏡30的軸方向[第2(b )圖的箭號方向]不會被聚光直接穿透平行光，被聚光於 正交於柱面透鏡30的軸方向的方向，形成有朝軸方向線 狀地延伸的光照射領域。 上述線狀光源的兩支低壓水銀燈1 1，是其長度方向沿 -13- 201107148 著被聚光於上述線狀地被聚光的點光源的光的長度方向的 方式所配置。 在上述線狀地被聚光的光的兩側，配置有利用支撐板 60所支撐的兩枚反射構件50。兩枚反射構件50是沿著線 狀地被聚光的光的長度方向延伸的方式所配置，而至少設 有點光源的一側的一面以反射面所形成。 兩枚的反射構件50是隨著朝向基材5，兩者接近的方 式傾斜著。利用此反射構件50以柱面透鏡的像差等，即 使稍從聚光角偏移的光，也可聚集至窄小的開口部（下述 的光出射口 40 )的情形。又，藉由例如鋁反射鏡形成反射 構件50，而可輕量化。又，對應於線狀地被聚光的光的形 狀，形成有將X方向（頭部的移動方向）的寬度變窄小的 開縫狀的光出射口 40。光出射口 40的X方向的寬度是例 如約8 m m。 在反射構件5 0的上述放電燈1 0的照射領域的相反側 的位置，位於鄰接於該反射構件的位置，配置有線狀光源 的低壓水銀燈1 1。 在第2圖的例子中，反射構件5 0是朝著基材5互相 地接近的方式傾斜之故，因而在基材5的近旁，兩枚的反 射構件5 0之間變窄小，而反射構件5 0與外裝蓋體8之間 變寬廣。在此反射構件50與以外裝蓋體所形成的間隙的 空間配置線狀光源的低壓水銀燈1 1，可有效利用死空間， 不會增大光照射裝置就可配置點光源與線狀光源。 又，來自點光源的照射光未包含可視或紅外線之故， -14- 201107148 因而對於燈具下面附近的溫度的影響也少。 還有，藉由反射構件50進行遮光之故，因而在線狀 光源的低壓水銀燈11，不會碰到來自點光源的照射光，而 不會受到熱性影響。所以，作爲線狀光源，可使用會受到 周圍溫度的影響而輸出容易大變動的低壓水銀燈。 如以上所述地，藉由柱面透鏡3 0與反射構件5 0，線 狀地聚光於點光源而提高峰値照度而可形成朝長度方向均 勻的光照射領域。 又，將線狀光源近接配置於基材5俾滅小衰減而提高 峰値照度，藉由槽狀反射鏡1 2俾線狀地聚光而形成光照 射領域。提高峰値照度，使得硬化油墨所必需的能量變小 ，而也可縮短硬化所必需的時間。又，抑制照射量而可硬 化油墨之故，因而可減低對於基材5的損傷，也可提高處 理速度。尤其是，低壓水銀燈是使得燈發光管以低溫進行 發光之故，因而，即使配置成接近於工件，也幾乎不會有 工件的溫度上昇。 硬化油墨是當在光引發劑照射著紫外線，則成爲基， 此爲接近於預聚體，單體的聚合性聚合（不飽和基），聚 合部分被活性化而逐漸地被鏈狀地被結合的反應。然而， 油墨與氧氣接觸的時間愈久，則依光所致的硬化變成不容 易。油墨中的光引發劑在開始硬化反應之前，藉由氧氣而 有喪失活性的氧氣阻礙的現象所致者。但是，若提高峰値 照度，則其成爲高密度，在供應新的氧氣之前就進行反應 之故，因而氧氣阻礙變小，使得硬化所必需的時間變短。 -15- 201107148 B .第2實施形態 在第1實施形態中，作爲聚光機構使用柱面透鏡3 0， 惟在第2實施形態中使用複數棒狀透鏡31。在第3圖表示 第2實施形態的光照射裝置的斷面圖。同圖（a)是X方 向（沿著頭部的移動方向的方向）的斷面圖。（b)是 Y 方向（正交於頭部的移動方向的方向）的斷面圖。 在本實施形態中，在反射面22的光出射側，平行地 接觸的方式將複數棒狀透鏡31排列配置於垂直於藉由反 射鏡22所反射的光的光軸的平面上。 從放電燈10所出射的光，是被反射在反射鏡22的旋 轉橢圓面狀的反射面，成爲被聚光於反射鏡22的第2焦 點的光，而入射於複數棒狀反射鏡3 1。從複數棒狀反射鏡 31所出射的光中，對於長度方向正交的方向的光，是藉由 棒狀反射鏡3 1的作用，被聚光在比反射鏡22的第2焦點 還要正前方，之後被擴展。另一方面，沿著長度方向的光 是棒狀反射鏡是關於此方向未具有功率之故，因而仍然被 聚光於反射鏡22的第2焦點。因此，在反射鏡22的第2 聚點，可得到朝正交於棒狀反射鏡3 1的長度方向的方向 的延伸的線狀地聚光的光，被照射在基材5。 又，與表示於上述第2圖者同樣地，在正交於線狀地 聚光的光的長度方向的方向（X方向的兩側設有兩枚的反 射構件5 0 )。兩枚反射構件5 0是沿著線狀地聚光的長度 方向（Y方向）延伸，至少設有點光源的一側的一面以反 -16- 201107148 兩 的 圖 射 構 的 射 響 光 燈 向 70 燈 稱 射面所形成，隨著朝向基材5 (光出射口 40 ) ’傾斜成 者會接近。 又，對應於線狀地聚光的光的形狀，形成將X方向 頭部的移動方向）的寬度變窄小的開縫狀的光出射口 40 反射構件50的上述放電燈1 0的照射領域的相反側 位置，在位於鄰接於該反射構件的位置，與表示於第2 者同樣，配置有線狀光源的低壓水銀燈1 1。此情形，反 構件5 0是也傾斜成朝基材5互相地接近，而在此反射 件50與以外裝蓋體所形成的間隙的空間配置線狀光源 低壓水銀燈1 1，就可有效利用死空間，而不必增大光照 裝置就可配置點光源與線狀光源。 又，與表示於第2圖者同樣，來自點光源的照射光 未包含可視或紅外線之故，對燈具下面附近的溫度的影 也少，而在線狀光源的低壓水銀燈1 1，不會碰到來自點 源的照射光，不會給予熱性影響。所以，作爲線狀光源 可使用受到周圍溫度的影響而輸出容易變大的低壓水銀 〇 又，在第3(b)圖中，在線狀地聚光的光的長度方 (Y方向）的兩側也設有反射構件70，惟此反射構件 是限制線狀地聚光的光的長度方向（Y方向）的擴展者， C.第3實施形態 在第〗、第2的實施形態中，作爲點光源使用放電 ，惟在第3實施形態’作爲點光源使用發光元件（以下 -17- 201107148 爲LED)，惟在不需要的可視，紅外線的放射極少之處爲 共通。 在第4(a)圖表示作爲點光源使用LED時的光源部 分的構成例。如同圖所示地，在金屬基板16上，直線狀 地排列配置例如9個LED封裝13。在基板16的安裝有上 述LED封裝13的一面的相反側的一面，安裝有散熱片。 LED是使用著例如電流1.5A，電壓35V，電力52W， 波長365nm的紫外線輸出爲5W者。 在LED封裝1 3的出射側安裝有柱面透鏡1 5。 第4(b)圖是使用表示於第4(a)圖的點光源的本 發明的第3實施形態的光照射裝置的斷面圖，同圖是表示 X方向（沿著頭部的移動方向的方向）的斷面圖。 如同圖所示地，在外裝蓋體8內，配置有表示於第4 圖的LED封裝13，金屬基板16，柱面透鏡15所構成的 點光源，在安裝有金屬基板16的上側（LED封裝1 3的一 面的相反側的一面），設有散熱片1 8。又，在散熱片18 的上部，設有風扇19，藉由風扇19來冷卻散熱片18。 在上述LED封裝1 3的兩側，有至少設有點光源的一 側的一面以反射面所形成的反射構件50槪略平行地安裝 於柱面透鏡15的軸方向[第4(b)圖的紙面垂直方向]。 又，LED封裝13是元件也小，又，將來自LED封裝 的光藉由柱面透鏡15線狀地聚光之故，因而反射構件50 是對於從LED封裝1 3所照射的光的中心光線未傾斜地， 平行地安裝兩枚的反射構件5 0。 -18- 201107148 從LED封裝13所放射的光，是藉由柱面透鏡15朝 著長度方向（柱面透鏡15的軸方向）被擴散。藉此，提 高相鄰接的LED封裝之間的光的均勻性。又，從LED封 裝1 3所放射的光，是藉由柱面透鏡1 5線狀地聚光於沿著 頭部的移動方向的方向（X方向）。又，以反射構件50, 其光是被關在窄小的領域。其結果，在柱面透鏡30的軸 方向形成有線狀地延伸的峰値照度的光照射領域。 在反射構件50的上述LED封裝13的照射領域的相 反側的位置，位在鄰接於該反射構件50的位置，配置有 線狀光源的低壓水銀燈1 1。 從LED封裝13等構成點光源時，在LED封裝13設 有散熱片18與冷卻用的風扇15，惟散熱片18 —般比 LED封裝13還要大，而外裝蓋體8是設成可覆蓋此些。 所以，如第4圖所示地，在反射構件50與外裝蓋體8之 間，形成有未被利用的空間。 線狀光源的低壓水銀燈1 1，是配置於以反射構件5 0 與外裝蓋體所形成的上述空間。藉此，可有效地利用死空 間’而與上述第1、第2實施形態同樣，不必增大光照射 裝置就可配置點光源與線狀光源。 又’與表示於第2圖者同樣，來自點光源的照射光， 未包含可視或紅外線之故，對燈具下面附近的溫度的影響 也少，而在線狀光源的低壓水銀燈1 1，不會碰到來自點光 源的照射光，不會給予熱性影響。所以，作爲線狀光源， 可使用受到周圍溫度的影響而輸出容易變大的低壓水銀燈 -19- 201107148 【圖式簡單說明】 第1圖是表示噴墨式印表機的頭部的槪略構成的立體 圖。 第2(a)圖及第2(b)圖是本發明的第1實施形態 的光照射裝置的斷面圖。 第3 ( a )圖及第3 ( b )圖是本發明的第2實施形態 的光照射裝置的斷面圖。 第4(a)圖及第4(b)圖是本發明的第3實施形態 的光照射裝置的斷面圖。 第5(a)圖及5(b)圖是習知的光照射裝置的斷面 圖。 【主要元件符號說明】 1 :噴墨式印表機 2 :導軌 4 :記錄噴頭 5 :基材 6 :光照射器 8 :外裝蓋體 1 〇 :放電燈 1 1 :低壓水銀燈 1 2 :槽狀反射鏡 -20- 201107148 1 3 : LED封裝 1 5 :柱面透鏡 1 6 :金屬基板 1 8 :散熱片 1 9 :風扇 2 0、2 2 :反射鏡 3 0 :柱面透鏡 3 1 :棒狀反射鏡 40 :光出射口 50 :反射構件 6 0 :支撐板 70 :反射構件Bm n ink. In the long arc of the metal halide lamp or the high pressure mercury lamp, the light of the ultraviolet light band is taken out. Therefore, as shown in Fig. 2, as the point light source, ultraviolet light having an efficiency of 300 to 450 nm can be used. Short-arc ultra-high pressure mercury: Further, a light-emitting element (LED) can also be used as described below. In order to converge the light source in a linear manner, it is necessary to expand the light to be superimposed on the light, so that the distance between the point source and the substrate can be increased by using the point source and the substrate to improve the uniformity in the longitudinal direction. In Fig. 2, a short-arc superelevator 1 使用 is used as a point source to reflect light emitted from a point source toward the substrate. As the mirror 20, for example, a condensing mirror having a spheroidal surface or a reflecting surface having a paraboloid of revolution can be used, and the same can be used for a reflecting surface having a paraboloid of revolution, that is, a purple color corresponding to 450 nm can be used as the main mirror. It is difficult to use only the light source for the oil source having the sensitization hardening above the initiator. For example, radiation, such as a wave, 10, domain, or a better one. The uniformized mercury discharge of the illuminance is measured by a mirror-like reflection condenser. In the case of a light mirror -11 - 201107148, the short arc type discharge lamp 10 is formed, for example, by an ultrahigh pressure mercury discharge lamp that efficiently emits ultraviolet light having a wavelength of 300 to 450 nm, and a pair of electrodes are disposed opposite each other in the discharge vessel. The distance between the electrodes is, for example, in a state of 0.5 to 2.0 mm. The mercury of the luminescent material is, for example, sealed at 0.08 to 0.3 Omg/mm3. Further, the rare gas and the pattern of the buffer gas for starting the subsidy are also sealed in a predetermined amount of sealing. The discharge lamp 10 is disposed such that a straight line connecting the pair of electrodes extends along the optical axis of the mirror 20, and the light-emitting portion of the discharge lamp 1 is disposed in the first focus mode of the mirror 20. For example, the distance between electrodes is 1.3 mm, the power is 200 W, the ultraviolet light output of the wavelength band of 300 nm to 400 nm is 16 W, and the ultraviolet light output of 300 nm to 450 nm is 25 W. Since it is a point light source, it is easily reflected by a mirror having a wavelength, and it is easy to obtain a light source whose output is hardly emitted at a wavelength of 450 nm or less of visible infrared rays. In the case where the temperature of the substrate is not increased, and the temperature of the substrate is not increased, and the infrared ray is irradiated on the substrate, the discharge lamp 10 is described above, but the output is increased. A point light source can also be formed by a plurality of discharge lamps 10. The linear light source can form an elongated irradiation field even if an optical system is not provided. Therefore, the distance between the point source and the substrate can reduce the attenuation of light and improve the utilization efficiency. In Fig. 2, two low-pressure mercury lamps 11 are used as the linear light source, and these are arranged in the vicinity of the light exit opening 40 of the light irradiator, and the groove mirror 1 2 is placed on the back side -12-201107148. Spotlighting. As the linear light source, as shown in Fig. 2, a low-pressure mercury lamp which efficiently emits ultraviolet light having a main emission wavelength of 254 nm can be used. The low-pressure mercury lamp (low-pressure mercury vapor discharge lamp) is, for example, a pinch-sealed electrode holder at both ends of the arc tube, and an argon gas of about 300 Pa and mercury are sealed in the arc tube. Typically, the discharge is maintained by supplying electrical energy to the mixed gas via the two electrodes. This radiation is mainly composed of a resonance radiation of mercury having a wavelength of 185 nm and 245 nm radiated from a portion called a sunlight column. The use of synthetic glass to form an arc tube effectively penetrates the ultraviolet rays below 200 nm, but cannot penetrate through the use of other glasses in the arc tube, and thus the substrate is mainly irradiated with light having a wavelength of 254 nm. For example, an ultraviolet light output having a diameter of φ 8 mm and an emission length of 70 mm and a main light emission wavelength of 5 W and 2 54 nm is 1.5 W. The point light source described above is an optical element having a linearly condensed light. In Fig. 2, a concentrating mechanism that condenses and emits light linearly is a cylindrical lens 30 and a reflecting member 50. The light emitted from the discharge lamp 1 点 of the point light source is reflected by the mirror 20 having a parabolic reflecting surface, and is incident on the cylindrical lens 30 as parallel light. In the cylindrical lens 30, in the axial direction of the cylindrical lens 30 [the arrow direction of the second (b) diagram], the condensed light is directly transmitted through the parallel light, and is condensed to be orthogonal to the cylindrical lens 30. The direction of the axial direction is formed with a light irradiation field extending linearly in the axial direction. The two low-pressure mercury lamps 11 of the above-mentioned linear light source are arranged such that their longitudinal directions are concentrated in the longitudinal direction of the light of the point light source which is condensed in the above-mentioned line shape along the -13-201107148. Two reflection members 50 supported by the support plate 60 are disposed on both sides of the linearly condensed light. The two reflecting members 50 are arranged to extend in the longitudinal direction of the light condensed in a line shape, and at least one side of the light source is formed on the reflecting surface. The two reflecting members 50 are inclined toward the substrate 5 in such a manner that they approach each other. The reflection member 50 can be concentrated to a narrow opening (the light exit opening 40 to be described later) by the aberration of the cylindrical lens or the like even if the light is slightly shifted from the light collecting angle. Further, the reflecting member 50 is formed by, for example, an aluminum mirror, and can be made lighter. Further, in accordance with the shape of the light that is collected in a line shape, a slit-like light exit opening 40 that narrows the width in the X direction (moving direction of the head) is formed. The width of the light exit opening 40 in the X direction is, for example, about 8 m m. At a position opposite to the irradiation region of the discharge lamp 10 of the reflection member 50, a low-pressure mercury lamp 11 having a linear light source is disposed at a position adjacent to the reflection member. In the example of Fig. 2, the reflecting members 50 are inclined so as to approach each other toward the substrate 5, so that the two reflecting members 50 are narrowed and reflected near the substrate 5, and the reflection is made. The member 50 and the exterior cover 8 are widened. The low-pressure mercury lamp 11 in which the linear light source is disposed in the space between the reflection member 50 and the outer cover body can effectively utilize the dead space, and the point light source and the linear light source can be disposed without increasing the light irradiation device. Moreover, the illumination light from the point source does not contain visible or infrared rays, and thus -14-201107148 has less influence on the temperature in the vicinity of the lower surface of the lamp. Further, since the reflecting member 50 shields the light, the low-pressure mercury lamp 11 of the linear light source does not hit the irradiation light from the point light source, and is not affected by the heat. Therefore, as the linear light source, a low-pressure mercury lamp which is susceptible to large fluctuations in output due to the influence of the ambient temperature can be used. As described above, the cylindrical lens 30 and the reflection member 50 are linearly condensed on the point light source to increase the peak illuminance, thereby forming a light irradiation field that is uniform in the longitudinal direction. Further, the linear light source is arranged close to the substrate 5 to annihilate a small attenuation to improve the peak illuminance, and the groove mirror 1 2 converges linearly to form a light-emitting field. Increasing the peak illuminance makes the energy necessary to harden the ink smaller, and also shortens the time required for hardening. Further, since the amount of irradiation can be suppressed and the ink can be hardened, damage to the substrate 5 can be reduced, and the processing speed can be improved. In particular, the low-pressure mercury lamp causes the lamp arc tube to emit light at a low temperature, and therefore, even if it is disposed close to the workpiece, there is almost no temperature rise of the workpiece. The hardened ink is a base which is irradiated with ultraviolet light to a photoinitiator, which is a polymerizable polymer (unsaturated group) which is close to a prepolymer, and the polymerized portion is activated and gradually combined in a chain form. Reaction. However, the longer the ink is in contact with oxygen, the hardening due to light becomes inconvenient. The photoinitiator in the ink is caused by the phenomenon that the oxygen is deactivated by the oxygen before the hardening reaction is started. However, if the peak illuminance is increased, it becomes a high density, and the reaction proceeds before the supply of new oxygen, so that the oxygen barrier becomes small, and the time required for hardening becomes short. -15-201107148 B. Second Embodiment In the first embodiment, the cylindrical lens 30 is used as the condensing means, but the plurality of rod lenses 31 are used in the second embodiment. Fig. 3 is a cross-sectional view showing the light irradiation device of the second embodiment. The same figure (a) is a cross-sectional view of the X direction (the direction along the moving direction of the head). (b) is a cross-sectional view in the Y direction (direction orthogonal to the moving direction of the head). In the present embodiment, the plurality of rod lenses 31 are arranged in a plane perpendicular to the optical axis of the light reflected by the mirror 22 so as to be in parallel contact with each other on the light exit side of the reflecting surface 22. The light emitted from the discharge lamp 10 is reflected on the ellipsoidal surface of the mirror 22, and is condensed on the second focus of the mirror 22, and is incident on the plurality of rod mirrors 3 1 . . Among the lights emitted from the plurality of rod mirrors 31, the light in the direction orthogonal to the longitudinal direction is concentrated by the action of the rod mirror 31, and is concentrated more than the second focus of the mirror 22. In front, then expanded. On the other hand, the light along the longitudinal direction is such that the rod mirror has no power in this direction, and is therefore concentrated on the second focus of the mirror 22. Therefore, at the second gathering point of the mirror 22, linearly condensed light extending in a direction orthogonal to the longitudinal direction of the rod mirror 3 1 is obtained, and is irradiated onto the substrate 5. Further, similarly to the second diagram, in the direction orthogonal to the longitudinal direction of the light concentrated in the linear direction (two reflecting members 50 are provided on both sides in the X direction). The two reflecting members 50 extend in the longitudinal direction (Y direction) of the linear condensing, and at least one side of the point light source is disposed on the side of the reverse-16-201107148. The lamp is formed by the incident surface, and is approached as it is tilted toward the substrate 5 (light exit port 40). In addition, the irradiation field of the discharge lamp 10 of the reflection member 50 of the slit-shaped light exit opening 40 which is narrowed by the width of the light in the direction of the linearly condensed light in the X direction is formed. At the opposite side position, a low-pressure mercury lamp 11 in which a linear light source is disposed, similarly to the second one, is located adjacent to the reflecting member. In this case, the counter member 50 is also inclined so as to be close to each other toward the substrate 5, and the linear light source low-pressure mercury lamp 1 1 is disposed in the space formed by the gap between the reflector 50 and the exterior cover body, and the effective use of the linear light source can be effectively utilized. The space can be configured with a point source and a linear source without having to increase the illumination device. Further, similarly to the one shown in Fig. 2, the illumination light from the point light source does not include visible or infrared rays, and has less influence on the temperature in the vicinity of the lower surface of the lamp, and the low-pressure mercury lamp 1 1 of the linear light source does not touch. Irradiation light from a point source does not give a thermal effect. Therefore, as the linear light source, it is possible to use a low-pressure mercury crucible which is easily affected by the influence of the ambient temperature, and in the third (b) diagram, both sides of the length (Y direction) of the light collected in a line shape The reflection member 70 is also provided, and the reflection member is an extension that restricts the longitudinal direction (Y direction) of the light condensed in a line shape. C. The third embodiment is a point in the second and second embodiments. In the third embodiment, the light-emitting element is used as a point light source (hereinafter, -17-201107148 is an LED), but it is not necessary to be visible, and the infrared radiation is extremely common. Fig. 4(a) shows a configuration example of a light source portion when an LED is used as a point light source. As shown in the figure, for example, nine LED packages 13 are arranged linearly on the metal substrate 16. A heat sink is attached to one surface of the substrate 16 on the side opposite to the surface on which the LED package 13 is mounted. The LED uses, for example, a current of 1.5 A, a voltage of 35 V, a power of 52 W, and a wavelength of 365 nm, and the ultraviolet output is 5 W. A cylindrical lens 15 is attached to the exit side of the LED package 13. Fig. 4(b) is a cross-sectional view showing a light irradiation device according to a third embodiment of the present invention, which is a point light source shown in Fig. 4(a), and Fig. 4 is a view showing the X direction (moving direction along the head) Sectional view of the direction). As shown in the figure, in the exterior cover 8, a point light source including the LED package 13, the metal substrate 16, and the cylindrical lens 15 shown in Fig. 4 is disposed, and the upper side of the metal substrate 16 is mounted (LED package). A side of the opposite side of the one side of the 1 3) is provided with a heat sink 18. Further, a fan 19 is provided on the upper portion of the heat sink 18, and the heat sink 18 is cooled by the fan 19. On both sides of the LED package 13, three sides having at least one point light source are mounted on the side of the cylindrical lens 15 in a direction parallel to the reflection member 50 formed by the reflection surface [Fig. 4(b) Paper vertical direction]. Further, the LED package 13 is also small in size, and the light from the LED package is condensed linearly by the cylindrical lens 15, so that the reflection member 50 is the center ray of the light irradiated from the LED package 13. The two reflecting members 50 are mounted in parallel without being inclined. -18-201107148 The light emitted from the LED package 13 is diffused by the cylindrical lens 15 in the longitudinal direction (the axial direction of the cylindrical lens 15). Thereby, the uniformity of light between adjacent LED packages is improved. Further, the light emitted from the LED package 13 is condensed linearly in the direction along the moving direction of the head (X direction) by the cylindrical lens 150. Further, with the reflection member 50, the light is kept in a narrow area. As a result, in the axial direction of the cylindrical lens 30, a light irradiation field in which the peak illuminance extends linearly is formed. A low-pressure mercury lamp 11 having a linear light source is disposed at a position opposite to the reflection member 50 at a position opposite to the irradiation region of the LED package 13 of the reflection member 50. When the point light source is formed from the LED package 13 or the like, the heat sink 18 and the cooling fan 15 are provided in the LED package 13, but the heat sink 18 is generally larger than the LED package 13, and the exterior cover 8 is set to be Cover this. Therefore, as shown in Fig. 4, a space that is not used is formed between the reflection member 50 and the exterior cover 8. The low-pressure mercury lamp 11 of the linear light source is disposed in the space formed by the reflection member 50 and the exterior cover. Thereby, the dead space can be effectively utilized. As in the first and second embodiments described above, the point light source and the linear light source can be disposed without increasing the light irradiation device. In addition, as in the case shown in Fig. 2, the illumination light from the point source does not contain visible or infrared rays, and has less influence on the temperature in the vicinity of the lower surface of the lamp, and the low-pressure mercury lamp 1 1 of the linear source does not touch. Irradiation from the point source will not give a thermal effect. Therefore, as a linear light source, a low-pressure mercury lamp which is easily affected by the ambient temperature and can be enlarged is used. -19-201107148 [Simple description of the drawing] Fig. 1 is a schematic diagram showing the head of the ink jet printer. Stereogram. 2(a) and 2(b) are cross-sectional views of the light irradiation device according to the first embodiment of the present invention. 3(a) and 3(b) are cross-sectional views of a light irradiation device according to a second embodiment of the present invention. 4(a) and 4(b) are cross-sectional views of a light irradiation device according to a third embodiment of the present invention. Figures 5(a) and 5(b) are cross-sectional views of a conventional light irradiation device. [Main component symbol description] 1 : Inkjet printer 2 : Guide rail 4 : Recording nozzle 5 : Substrate 6 : Light illuminator 8 : Exterior cover 1 〇 : Discharge lamp 1 1 : Low pressure mercury lamp 1 2 : Slot Mirror -20- 201107148 1 3 : LED package 1 5 : cylindrical lens 1 6 : metal substrate 1 8 : heat sink 1 9 : fan 2 0, 2 2 : mirror 3 0 : cylindrical lens 3 1 : rod Mirror 40: light exit port 50: reflection member 60: support plate 70: reflection member