how do you tell your husband you dont want them at ultrasounds?

im 5 weeks 1 day pregnant, and my first appointment is in 4 weeks. i dont want my husband there, and i doubt i'll want him there at any others. when i first found out i was pregnant, he told me he didnt want the baby (despite the fact he told me to come off the pill and that we could ttc seven months ago). later I realised its because he's knows we're not going to have extra money for him to buy hundreds of video games like he has been doing! so basically he's thinking about his own selfish requirements instead of thinking about the baby that he told me before he wanted! im scared that if he sees scans of the bavy or something he's going to lose it. he's been violent and aggressive in the past and im so scared that its going to resurface. and is there any way that i can be married but not put his name on the birth certificate because im going to try and work it out but if i cant, i dont want someone violent in my baby's life.