将imagick实例上传到Laravel中的AWS s3

I have a pdf to image conversion in Laravel project, using imagick classs. After all I need to save it to AWS s3. How can I do that?

$im = new imagick($file.'[0]');
        $im->setImageFormat('jpg');

$uploadPath = Storage::disk('s3')->put("file/img1.jpg", ??????, 'public');