光學(xué)玻璃的清洗干凈與否與方法有關(guān)系
光學(xué)玻璃的清洗分為鍍膜前,鍍膜后清洗,加工商應(yīng)跟據(jù)鍍膜前后污染物的不同,采用不同的清洗方法,選擇專用的鍍膜前光學(xué)玻璃清洗劑.
1、鍍膜前清洗
鍍膜前清洗的主要污染物是求芯油(也稱磨邊油,求芯也稱定芯、取芯,指為了得到規(guī)定的半徑及芯精度而選用的工序)、手印、灰塵等.由于鍍膜工序?qū)︾R片潔凈度的要求極為嚴(yán)格,因此清洗劑的選擇是很重要的.在考慮某種清洗劑的清洗能力的同時(shí),還要考慮到他的腐蝕性等方面的問題.鍍膜前的清洗一般也采用與研磨后清洗相同的方式.
2、鍍膜后清洗
一般包括涂墨前清洗、接合前清洗和組裝前清洗,其中接合前清洗(接合是指將兩片鏡片用光敏膠粘接成規(guī)定的形狀,以滿足無法一次加工成型的需求,或制造出較為特殊的曲率、透光率的一道工序)要求更為嚴(yán)格.接合前要清洗的污染物主要是灰塵、手印等的混合物,清洗難度不大,但對(duì)于鏡片表面潔凈度有非常高的要求,其清洗方式與前面兩個(gè)清洗工藝相同.由于鍍膜層比較容易受強(qiáng)堿性傷害,鍍膜后不能使用強(qiáng)堿性清洗劑,需要專用的鍍膜后光學(xué)玻璃清洗劑,此種清洗劑不傷膜層,去污力強(qiáng),可完好的保存膜層.
所以光學(xué)玻璃鍍膜后,一般建議用專業(yè)的鍍膜后光學(xué)玻璃清洗劑使用。光學(xué)玻璃鍍膜常見的品質(zhì)問題介紹及避免方法產(chǎn)生原因：因鍍膜玻璃與普通透明玻璃有些光學(xué)上的差異，所以在安裝使用上就有更嚴(yán)格的要求，其有可能產(chǎn)生熱應(yīng)力破0裂的主要原因有：1、在設(shè)計(jì)方面：鍍膜玻璃的防熱炸裂設(shè)計(jì)是建筑設(shè)計(jì)中必須認(rèn)真考慮一個(gè)重要因素。
Cleaning of Optical Glass
The cleanliness of optical glass is related to the cleaning
method. Cleaning is divided into pre-coating and post-coating cleaning.
Manufacturers should adopt different cleaning methods based on the type of
contamination before and after coating, and use specialized cleaning agents
designed for pre-coating optical glass.
1. Pre-Coating Cleaning
The primary contaminants before coating include centering
oil (also known as edging oil, used in the centering process to achieve
specified radius and centering precision), fingerprints, and dust. Since the
coating process has extremely strict requirements for lens cleanliness, the
selection of the cleaning agent is very important.
While considering the cleaning ability of a particular
cleaning agent, its corrosiveness and other factors must also be taken into
account. Pre-coating cleaning generally uses the same methods as post-grinding
cleaning.
2. Post-Coating Cleaning
Post-coating cleaning generally includes pre-inking cleaning, pre-bonding cleaning, and pre-assembly cleaning. Among these, pre-bonding cleaning (bonding refers to the process of adhering two lenses together with photosensitive adhesive to achieve a specified shape, either to meet requirements that cannot be fulfilled in a single process or to create special curvatures and transmittance) requires stricter standards.
The main contaminants to be removed before bonding are mixtures of dust and fingerprints. The cleaning difficulty is not significant, but the cleanliness requirements for the lens surface are extremely high. The cleaning method is the same as the previous two cleaning processes.
Since coating layers are easily damaged by strong alkaline substances, strong alkaline cleaning agents cannot be used after coating. Specialized post-coating optical glass cleaning agents are required. These cleaning agents do not damage the coating layer, have strong cleaning capabilities, and effectively preserve the coating layer. Therefore, after optical glass coating, it is generally recommended to use professional post-coating optical glass cleaning agents.
