五、新型說明： 【新型所屬之技術領域】 本創作係與高照明用燈具有關，更詳而言之是指一種具有 良好光穿透性的燈具。 【先前技術】 圖1為一種可產生面照明效果的燈具1，包括有一燈罩2、 一以透明玻璃作成的前蓋3及一高亮度燈泡4。該燈具1的特 色在於利用燈罩2内面反射光線以強化照明效果，惟，光線在 穿透該前蓋3時仍有能量上的損耗而影響穿透率，歸納影響穿 透率的原因有： 1. 前蓋3是以玻璃作成，其兩侧平滑表面將先後對入射光 4成反射，間接地使得穿透率下降，一般而言概略會使得穿透 率下降百分之八左右；以及 2. 玻璃本身的材質特性（如：矽、鈉、鈣等）仍有吸收光 的作用，驗地亦使得穿透率下降，-般而言，會使得穿透率 下降百分之一左右。 是以，單純以玻璃作為前蓋3時，其光穿透率並非百分之 百，而是維持在百分之九十—左右；其次，反射光線將造成燈 具1内部（即燈罩2與前蓋3所形成空間）溫度升高，不利於 燈具1的長時間使用。 M410147 【新型内容】 有鑑於此，本創作之主要目的在於提供一種具有良好光穿 透性的燈具，係提高燈具前蓋的光穿透率，以提升照明亮度。 緣以達成上述目的，本創作所提供具有良好光穿透性的燈 具包含一燈罩、一透明前蓋及一發光體位於該燈罩與該透明前 盍之間，其中，該透明前蓋具有一玻璃本體，以及一抗反射層 叹於該玻璃本體之一表面，該表面面對該燈罩。 依據上述構思，本創作一較佳實施例之抗反射層厚度小於 20/zm。 依據上述鄉，梢作—絲實酬之抗反騎材料係選 自氧化石夕（si〇2)、氣化錯（Zr〇2)、氧化銘（A1A)及貌化 鎂（MgF2)所構成族群其中之一者。 【實施方式】 為能更清楚地說明本創作，兹舉較佳實施例並配合圖示詳 細說明如後。 圖2為本創作-較佳實施例之燈具1〇〇，揭*包括一燈罩 1〇、一透明前蓋20及—以I氣燈泡30 (High lntensive Discharge，HID)為例但不以此為_發光體，骑氣燈泡％ 位於該燈罩10與該透明前蓋2〇之間。 燈罩10在本實施例中是以玻璃本體12為主要型體，請來 圖3所示，在_核12 _表面職有—經職鍍(spu^) 4 M410147 方式製得厚度平均的反射層14，該反射層14為銘鑛膜，用以 反射該&氣燈泡3〇發光時絲線，使改變方向後的光線朝該 透明前蓋2G前進，據以射光束而達職倾明效果之目 的。另，反射層14的表面設有-透明的隔離塗層16以避免反 射層14遭氧化，玻璃本體12的外表面則視需求而選擇加設一 為鈦鑛膜或疋鐵乱龍鍍膜構成的散熱層18，據以強化熱能的 傳導及散熱速度。 • 透明前蓋20結合於燈罩10下方，具有-玻璃本體22用 於保護該I氣燈泡3〇 ’以及—抗反射層24是經過濺鍵加工而 形成厚度小於2G/m的薄膜，如圖2及圖4所示，抗反射層 24是附著於玻璃本體22面對該燈罩1〇的表面上；另，前述 抗反射層24是以具有巾低折射率的材料製成，例如氧化石夕 (Si02)、氧傾（Zl〇2)、氧脑（A1⑹或氟傾 等’當然’亦可選擇使用具有1/4 λ波長的薄膜作為抗反射層。 » 至此’錢紐泡30職生人射解先與林鱗射率的抗 反射層24接觸時，可藉由減低反射光線的情形來提高光的穿 透率。 歸納本創作功效有： 1·透明則蓋20在内面（即面對氣氣燈泡3〇的表面）設有 低折射率的抗反射層24，可有效將光穿透率提升至接近百分 之九十七左右，有助於提升照明亮度。 2.因透明前蓋20的光穿透率被提升’減緩了反射光線殘 5 留於燈具100内部的情形，連帶地降低了燈具100内部溫度而 了延長亂氣燈泡3〇使用壽命。 3.承2，辅以燈罩10是以導熱值介於1.0〜1.4 W/m . k 之間的玻璃本體12為主要構成，使得燈具腦内部的高溫更 可透L玻璃本體12的快速導熱而提高散熱效率，據以延長燈 具100的使用壽命。 以上所述僅為本創作較佳可行實施例而已，舉凡應用本創 作說明書及憎專利細所為之等效結構變化，理應包含 創作之專利範圍内。 M410147 【圖式簡單說明】 圖1為已知燈具的剖視圖。 圖2為本創作一較佳實施例燈具的剖視圖。 圖3為本創作上述較佳實施例燈具之燈罩的局部示意圖。 圖4為本創作上述較佳實施例燈具之透明前蓋的局部示意圖。 【主要元件符號說明】 100燈具 10燈罩 12玻璃本體 14反射層 16隔離塗層 24抗反射層 18散熱層 20透明前蓋 22玻璃本體 30氙氣燈泡V. New description: [New technical field] This creation is related to high-lighting lamps, and more specifically refers to a lamp with good light penetration. [Prior Art] Fig. 1 shows a lamp 1 which can produce a surface illumination effect, comprising a lamp cover 2, a front cover 3 made of transparent glass, and a high-intensity bulb 4. The luminaire 1 is characterized in that the inner surface of the lampshade 2 is used to reflect light to enhance the illumination effect. However, when the light penetrates the front cover 3, there is still energy loss and the penetration rate is affected. The reasons for influencing the penetration rate are as follows: 1 The front cover 3 is made of glass, and the smooth surfaces on both sides will reflect the incident light 4 in turn, indirectly causing the transmittance to decrease, generally making the transmittance drop by about 8 percent; and 2. The material properties of the glass itself (such as strontium, sodium, calcium, etc.) still absorb light, and the ground test also reduces the penetration rate. In general, the penetration rate is reduced by about one percent. Therefore, when glass is used as the front cover 3, the light transmittance is not 100%, but is maintained at about 90%. Secondly, the reflected light will cause the inside of the lamp 1 (ie, the lamp cover 2 and the front cover 3). Forming space) The temperature rise is not conducive to the long-term use of the lamp 1. M410147 [New Content] In view of this, the main purpose of this creation is to provide a luminaire with good light penetration, which improves the light transmittance of the front cover of the luminaire to enhance the illumination brightness. In order to achieve the above object, the lamp provided with good light transmittance of the present invention comprises a lamp cover, a transparent front cover and an illuminant between the lamp cover and the transparent front sill, wherein the transparent front cover has a glass The body, and an anti-reflective layer, sigh on a surface of the glass body, the surface facing the lampshade. In accordance with the above concept, the thickness of the antireflection layer of a preferred embodiment of the present invention is less than 20/zm. According to the above-mentioned township, the anti-anti-riding material of the tip-silk remuneration is selected from the group consisting of oxidized stone (si〇2), gasification error (Zr〇2), oxidized Ming (A1A) and magnified magnesium (MgF2). One of the ethnic groups. [Embodiment] In order to explain the present invention more clearly, the preferred embodiment will be described in detail with reference to the accompanying drawings. 2 is a lamp 1 of the present invention-preferred embodiment, including a lamp cover 1〇, a transparent front cover 20, and an example of a high lntensive discharge (HID) 30, but not The illuminator, the riding light bulb % is located between the lampshade 10 and the transparent front cover 2〇. In the present embodiment, the lampshade 10 has a glass body 12 as a main body. As shown in FIG. 3, a thickness-average reflective layer is formed on the surface of the _nuclear 12 _ surface-supplied (spu^) 4 M410147. 14. The reflective layer 14 is an inscription film for reflecting the wire of the light bulb 3 illuminating, so that the light after changing direction advances toward the transparent front cover 2G, and according to the beam, the effect is achieved. purpose. In addition, the surface of the reflective layer 14 is provided with a transparent barrier coating 16 to prevent the reflective layer 14 from being oxidized, and the outer surface of the glass body 12 is optionally formed by adding a titanium oxide film or a stellite coating. The heat dissipation layer 18 is used to enhance the conduction and heat dissipation speed of the thermal energy. • The transparent front cover 20 is coupled to the underside of the lampshade 10, having a glass body 22 for protecting the I gas bulb 3' and the antireflection layer 24 is formed by sputtering to form a film having a thickness of less than 2 G/m, as shown in FIG. As shown in FIG. 4, the anti-reflection layer 24 is attached to the surface of the glass body 22 facing the lampshade 1; and the anti-reflection layer 24 is made of a material having a low refractive index of the towel, such as oxidized stone eve ( Si02), oxygen tilt (Zl〇2), oxygen brain (A1 (6) or fluorine tilt, etc. 'Of course' may also choose to use a film with a 1/4 λ wavelength as an anti-reflective layer. » So far, 'Qian Xin bubble 30 students shot When the first anti-reflective layer 24 is contacted with the anti-reflective layer 24, the light transmittance can be improved by reducing the reflected light. The inductive effects are as follows: 1. Transparent cover 20 on the inner surface (ie facing the gas) The surface of the gas bulb 3〇 is provided with a low refractive index anti-reflection layer 24, which can effectively increase the light transmittance to about 97%, which helps to improve the illumination brightness. 2. Due to the transparent front cover 20 The light penetration rate is increased' to slow down the reflection of light residuals 5 remaining inside the fixture 100, The internal temperature of the lamp 100 is lowered to prolong the service life of the gas bulb 3. The bearing 2 is supplemented by the lamp cover 10, which is mainly composed of a glass body 12 having a heat conduction value between 1.0 and 1.4 W/m. The high temperature inside the lamp brain can make the heat conduction of the L glass body 12 more transparent, thereby improving the heat dissipation efficiency, thereby prolonging the service life of the lamp 100. The above description is only a preferred embodiment of the present invention, and the application specification is applied.等效 细 憎 憎 等效 等效 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 410 FIG. 4 is a partial schematic view showing the transparent front cover of the lamp of the above preferred embodiment. [Main component symbol description] 100 lamp 10 lampshade 12 glass body 14 reflective layer 16 isolation coating 24 anti-reflection layer 18 heat dissipation layer 20 transparent front cover 22 glass body 30 xenon bulb